Chaos Gods

"The creatures of the Warp are just "aliens" too, but they are not life forms as we understand the term. They are not organic. They are extra-dimensional, and they influence our reality in ways that seem sorcerous to us. Supernatural, if you will. So let's use all those lost words for them... daemons, spirits, possessors, changelings. All we need to remember is that there are no gods out there, in the darkness, no great daemons and ministers of evil. There is no fundamental, immutable evil in the cosmos. It is too large and sterile for such melodrama. There are simply inhuman things that oppose us, things we were created to battle and destroy. "

– Horus Lupercal

The Chaos Gods are the gods which rule over the Realm of Chaos in Warhammer Fantasy Battles and the Warp in Warhammer 40,000. They love nothing so much as dicking with each other, except perhaps with their mortal followers, and literally each other (especially Slaanesh). Before they were gods, they were generally benevolent beings, when the Warp was a calm sea. Each one is formed by the emotions of living souls clumped together in the Warp/Realm of Chaos. Contrary to standard thought, they personify good attributes as well, and are powered as much by good as by bad. Even if said god started out entirely bad, in their eventual evolution as part of their natures, they will kill gods who represented entirely good things, and will gain not only their values, but their power by said value.

Be aware many of the gods' values will and do intersect. This is as much due to the chaotic nature of the gods as it is to the multitude of emotions that make up the living. For example: let's say you're literally obsessed with brutally murdering people and you get a real nice kick out of it. The act of spilling blood is gonna feed Khorne, while the ecstasy and obsessive sensation you get out of it will feed Slaanesh. So yeah, there's some overlap, in that an individual doing a certain thing, under specific circumstances, can simultaneously feed multiple Chaos Gods, but the God who was invoked (whether intentionally or no) upon when commuting the action will get the most power out of it (I.E: You killed someone for Khorne. While your ecstasy from the murder will feed Slaanesh a bit, your simple act of ending a life will feed Nurgle, your continued ambition to please the Blood God to earn his favor will also feed Tzeentch a bit, but Khorne gets the most since you offered that kill to him foremost).

Overview

According to the wikifans over at the Official Warhammer 40k Wiki, the Chaos gods were created and are sustained by the collective emotions of 'every sentient being of the material universe'; so not just the Milky Way, but every alien, both heretical and loyal, in the whole universe. This however probably isn't true, or rather it's just very bad wording, because if the Milky Way alone has all of these sentient races in it, then there's a safe bet that most other galaxies in the rest of the universe also have a multitude of sentient races too. And there are like, at least billions upon billions of galaxies in the observable universe, let alone the true universe which is likely many magnitudes larger. Based on what we've seen in the fluff, That many galaxies, filled with that many sentient lifeforms, all feeding only four Chaos Gods, would give said Chaos Gods so much power that they would probably have the capability to turn the entire galaxy (and many others) into massive Eyes of Terror at a simple scheming click of their heretical fingers. But of course, that hasn't happened (thank the fucking Emperor). Which probably means those wikijerks are talking complete unadulterated bullshit (or are making the common and infuriating mistake of conflating "universe" with "galaxy"). In actuality, the full range of influence the Ruinous Powers have only extends to the area of the Milky Way and not much further. After all, a specific location in the Warp corresponds with a specific location in the Materium; your thoughts and emotions will have an effect (albeit very minor) on the Warp in your specific corresponding location, and the collective thoughts and emotions of a galaxy's population will only have an effect on that specific galactic area of the overall Warp. This essentially means the four Chaos Gods are completely confined to the Milky Way galaxy, because that's where the emotions that created and feed them are currently being felt.

So what does that really mean? Well, it means the Warp in the vast, cold, empty space between galaxies is calm as fuck, absolutely nothing like the infested shitty plughole it is right now in our home galaxy, because there's no sentient life and hence no chaotic emotions there to stir it up. However, this also means that if other galaxies out there have their own interstellar sentient species with a presence in the Warp, then those galaxies will have their own Chaos Gods [likely just analogous versions of the four (point five) we have, although it's also possible that the different emotions might be allocated differently for each galactic pantheon; Andromeda might have gods based on the seven deadly sins, for example] that reside there and are also confined to the area of their own galaxy. But who knows? Maybe each warp god is a reflection of the galaxy that birthed it, and the aliens that live in other galaxies there have actually got their shit together and all get along like best buddies in a setting that just oozes noblebright from every pore, and the Chaos Gods there aren't even called that because they're all so friendly and cushy to everyone and like to play vidyagames with each other and cracking open cold ones on a warm Friday night while watching The Batchelor. Maybe the Warp gods in most galaxies actually maintain contact with those in neighbouring ones, and everyone just stays the fuck out of the Milky Way for the same reason most 21st century tourists stay out of Somalia. How sweet... I wonder what would happen if two galaxies, both with their own analogous Chaos Gods, collided. Would they just absorb each other into a new pantheon of four even-more-powerful Gods? Would they fight each other until one reigned supreme? Or would they get along like good ol' chums since they understand each other perfectly? Anyway, tangents. This fallacy is explained further in detail just right below.

Now that I say all of this, why the actual FUCK has no one decided to just up and leave the galaxy already?! It's a complete shithole! It's filled to the absolute brim with nothing but copious amounts of Grimdark and a whole host of things that want to murder, rape and eat you, not necessarily in that order. And it's still being filled up with that shit, both crawling out from under the ground and flying in from outer space to OMNOMNOMNOM the faces of everyone you both despise and adore. Even if you're lucky enough to escape the immediate crossfire, you're still likely to be part of a civilisation that completely smashes any feeling of worth or individuality out of you and treats you like just another cog in the machine of trillions of cogs. Just leave already, god dammit. What about Andromeda? I hear it's rather pleasant this time of year. At least compared to this literal hellhole. But it's probably not possible for the same reason why Big Bobby G and Lion-O couldn't simply fly over the Ruinstorm to get to Terra; if the space between galaxies is calm because there are no souls, that probably means there's no warp either, making intergalactic travel impossible. But this is just baseless speculation that contradicts the nature of the Warp's existence, specifically that the Warp is influenced by life, not created by life, and existed before even the first lifeforms did. Plus, you need to be Necron-tier to get pass the nids off galaxy. Or it could be things like the Void Dragon possibly eating a million galaxies before returning to ours where he then met the Emperor, the Tyranids consuming a thousand galaxies, and generally such things indiciate that outside of the Milky Way is worse than in the Milky Way.

But then again, It is officially stated that Warhammer 40k and Warhammer Fantasy are completely different franchises which just so happen to have the same Warp with the same Chaos Gods.

Now, where were we? Oh yes, Chaos Gods. Ahem.

On the Question of Omnipotence

One of the most talked about and hotly debated topics, especially amongst Chaos players is the question of Omnipotence. Other than massive fanwanking and colossal jerk-offs, it must be stated and stressed that the Chaos Gods for all their strength are not omnipotent, for to be omnipotent means to be all-powerful and the idea of the Great Game greatly debunks this claim. Part of the problem may lie in the fact that folks like to give examples of the power of the Chaos Gods from codexes from the Rogue Trader era and Second Edition, eras which are of dubious canonicity. You see, what they don't seem to understand is that GW, especially early GW, had a habit of making use of flowery language and hyperbole to exaggerate the grandeur of something or someone. This by itself is not a problem, as 40k runs on exaggeration. The problem is that some folks seems to lack any ability to discern nuances or critical thinking skills and proceed to extrapolate these hyperboles as true, completely ignoring the fact that the majority of these flowery examples came from either a) the viewpoint of a Chaos Cultist b) in-universe propaganda and/or c) extremely old sources where all sorts of wacky hijinks were birthed. As such, the credibility is highly suspect and should be taken with a mountain of salt.

So when sources 'claim' that the Chaos Gods could destroy 'universes' or Greater Daemons were destroying entire planets wholesale within the Warp, the validity should be scrutinized in the same way fa/tg/uys scrutinize Furries. What the Chaos Gods or their followers claim to be true (remember that they are notorious liars) does not match up with their actual abilities both in Warpspace and in Realspace. If they were truly multiversal as they claim, then, first of all, the Shadow of the Warp should not be an existential threat to them. After all, a true universal - let alone multiversal - entity should not even notice a few intergalactic bugs on the windshield. Moreover, the Necron Pylons should also not be considered a threat to the big four, for if they possess such levels of reality-warping power, they should not be dependent in letting their errand boy do all their dirty work for them in realspace. Even in the Warp, their so-called 'omnipotence' did not stop a certain Mary Sue from trashing their backyard from time to time.

The reality is the Chaos Gods, as far as deities go in Science Fiction, are pretty weak sauce. For example:

• They are utterly dependent on the emotions of a single galaxy (if they really did not care about emotions as some may claim, then they shouldn't be that invested in the Imperium now would they?).
• Certain critters with enough mindless psychic connections can close entire Warp-rifts and there is nothing the Chaos Gods can do about it;.
• Tzeentch's self-proclaimed omniscience is put into doubt seeing as how he and his underlings failed to predict the rise of Robo Guillitan and the following mechinations of it.
• Their self-proclaimed reality-warping powers are self-contained in the Warp, and even then it is restricted to their own realms. Much like how a child could create and manipulate anything in a sandpit does not automatically equate to the child turning sand into gold, the same analogy applies here - seriously it is telling that the Gods of Chaos couldn't do jackshit about the Necron Pylons for 60 million years since the War in Heaven.
• Their dreaded Chaos corruption such as Scrapcode could literally be stopped by an AdMech Priest cutting off the connections fast enough during the Fall of Mars, knowing how abysmal 40k's A.I. are, that shit ain't touching the likes of a Culture Mind, a Contendor-class A.I., and the Anti-Xeelee. To state otherwise would be a No Limit Fallacy and a False Equivalency since the idea of scrapcode would be overpowered against the likes of the Necrons, Tau and the AdMech, yet this shit has seldomly been used which suggests limitations on the behalf of Chaos.

In retrospect, the contradictions of what the Chaos Gods/followers claim and what they are actually shown to do is no different than the problems the Hive Mind has found itself in as can be read here. They are all bound by GeeDubs' status quo and the balance of power, as such their powers are restricted insofar in one galaxy to preserve the status quo. With the bombshell of Godblight, the argument of omnipotence has finally been shot down after Chaos got hit with a massive nerf bat. From the Emprah suggesting that the Daemon Primarchs can be redeemed, thereby making the threat of Chaos corruption impotent to Big-E literally shoving his Power Sword up Nurgle's ass and his garden, permanently wounding him grievously, to the outright confirmation that a Chaos God without sufficient faith would degenerate into Warp-soup and become perma-K.O. as faith is what gives Warp entities sentience. Godblight has single-handily trashed any presumption of Chaos omnipotence in but a few chapters, and let's not even get into a single Primaris Lieutenant kicking one of the strongest Nurglite Greater Daemons in the ass...somehow.

So are the Chaos Gods powerful? In the universe of Star Wars, Star Trek and Mass Effect, sure, of course they are. Are they omnipotent multiversal destroyers? Hell the fuck no. If you're honestly thinking that these guys are in the same ballpark as the Abstract Entities of Marvel and DC, the Time Lords or the motherfucking Downstreamers, then you should probably go see a doctor for a prostate exam; constant wanking is bad for ya health you know.

Tl;dr, 40k is prone to not applying the concept of Show Don't Tell, which is ironic given the reputation of 40k in general, but it happens again and again and again. A good narrative showcases its targets' capabilities and feats, a bad narrative just tells them to the viewers. If the Chaos Gods can actually pop universes like grapes, then we better fucking see them popping an actual universe. No wishy-washy flowery language, no offhand statements in the codex, no shenanigans inside the Warp which is unreliable at best. Show Don't Tell. It isn't just the Chaos Gods that are guilty of this mind you, the Men of Iron and even the War in Heaven Necrons are guilty of this as well. Sun-snuffing machines the size of Saturn's rings and Breath of the Gods asshattery means jack shit if we don't actually see them in action. Show Don't Tell.

Khorne

Lord of RAEG, War, Butthurt, Steroids and Testosterone. Really just a grouchy puppy.

BLOOD FOR THE BLOOD GOD! SKULLS FOR THE SKULL THRONE! MILK FOR THE KHORNE FLAKES! BUTTER FOR THE POP KHORNE! Oh, sorry. In case it wasn't obvious, Khorne is the god of battle, martial honor, and oh yeah, BLOOD! Although primarily formed from hate and rage, bravery and honor are also thrown in the mix. Also in the mix are mercy (in particular, mercy for those too weak to put up a fight and be a challenge to kill. This is almost never shown in the fluff though, annoyingly), courage, regret, fear, athleticism, determination, daring, impulsiveness, and struggling onward in the face of any odds.

• Gender - DEFINITELY A MAN, AND DON'T YOU FORGET IT!! I thought he was female? *BLAM!* *BLAM!* THAT'S DOUBLE HERESY!!
• Main Enemy - Slaanesh, as he considers him/her/them to be too frilly and really doesn't care about sensations, especially when they prolong the spilling of blood, to the point fluff wise it is distinctly pointed out he hates the priss even more than tzeench, going so far as to have slaaneshi and khornates have the hatred special rule against eachother.
• Bro god - Nurgle, although he doesn't seem to mind Khaela Mensha Khaine (they're probably the same thing, though), and he is rumored to be in a polyamorous relationship with Mork and Gork.
• Love Interest - Gork and Mork (see above). Valkia the Bloody (Canonically - yes, your brain is now broken).
• Dedicated Chaos Space Marine Legion - The World Eaters, other various chapters and bands of warriors dedicated themselves to him since. Also has IG-equivalent armies like the Blood Pact.
• Warriors of Chaos "Hero"/Chaos Tribe: Arbaal the Undefeated (ANGRY VIKINGS!! FUCK YEAH!!), Valkia the Bloody, Scylla Afingrimm (former warlord turned Chaos Spawn and still kicks ass), Hrafn Untam, Haargroth the Blooded, Skarr Bloodwrath. Khorne also has an entire Norse confederation especially devoted to him known as the Aeslingr.
• Sacred Number - 8 ("The eightfold path")
• Adjective - Khornate

• 

  A Khornate Berzerker Heretic Astartes of the World Eaters Traitor Legion.

Nurgle

Despite his and his minion's appearances, they're actually pretty nice (for debatably self-aware boogers).

Nurgle is the god of filth, pestilence, decay, and generally being a cool dude (which are obviously related). Formed from despair and fear of death, his portfolio also includes acceptance and stoicism. Other values include inevitability, empathy, kinship, struggle, (familial) love, tradition, mercy, and memory. Nurgle is also notable for being the only Chaos god that cares for his followers whatsoever, bordering on love (in fact in 40k, he loves the Eldar goddess Isha so much that he chained her up and force feeds her his new diseases, because that's the only way he knows how to express love... yeah, love sucks sometimes all the time most of the time). Also note that one aspect of him that is played up in the End Times is that he is in fact the god of life, only for him it means unrestrained, infinite life such as with pathogens and tumors.

• Gender - A (slob of a) man. A VERY fat, old one.
• Main Enemy - Tzeentch, the paragon of hope and change, in opposition to Nurgle's representation of decay and inevitability.
• Bro god - Khorne, mostly because Nurgle is the only Chaos god Khorne doesn't entirely hate.
• Love Interest - His joy and wife, Isha. Now pins for Alarielle, since he lost Isha to her.
• Dedicated Chaos Space Marine Legion - The Death Guard. Has tons of other followers like the The Purge (omnicidal wackos who have no problem using chemical and virus weapons on helpless populations), Apostles of Contagion (Zombie Plague aficionados), the Lords of Decay (utterly loyal Marines sent to die in the Eye, holy fuck these guys made a direct assault on the Solar System and won Pluto), and human IG armies like the rebellion on Vraks.
• Warriors of Chaos "Hero"/Chaos Tribe: Valnir the Reaper, old school champion of Nurgle; Festus the Leechlord (this guy used to be a doctor in the Empire; he's not even a Northman). The Crow Brothers of the Björnlings are especially devoted to him also (Festus leads these guys), the Glottkin, Gutrot Spume (a Nurglite pirate barbarian), the Maggoth Lords of Icehorn Peak. It could also be possibly argued (especially considering Age of Skubmar) that the Skaven Clan Pestilens is some sort of splinter cult built on worshipping Nurgle while thinking that they're worshiping an aspect of the Horned Rat.
• Sacred Number - 7 (though 3 is also a popular number)
• Adjective - Nurglite
• Please note that the above lore mixes both Warhammer fantasy lore and Warhammer 40k lore which, although the character is virtually indistinguishable, are not the same thing. Maybe.

• 

  A Plague Marine of the Death Guard Traitor Legion.

Slaanesh

The embodiment of all things PR0N.

Slaanesh is the god/dess of pain, pleasure, and perfection... or, in other words, a god of emotions formed from emotions, not all of which are bad. In 40k (WHFB didn't elaborate how Slaanesh was born, so we can only assume he/she/they manifested normally like the other Gods), the an inherently psychic race called the Eldar created him/her/them by having so many damn orgies they tore space-time a new asshole (The Eye of Terror). Formed mainly from hedonism and excess, love and creativity are also attributes of Slaanesh. Other facets include perfectionism, obsessiveness, attention-whoring, jealousy, sensuality, DRUGS, empathy, self-expression, individuality, art, music, joy, and admiration (so quite literally the god of sex, drugs, and rock 'n roll!).

• Gender - Whatever you want it to be, sugar! In WH Fantasy you'll see illustrations of a lecherous old hag / old man / old bits-of-both; in WH40k depictions are of a young flamboyant hermaphrodite.
• Main enemy - The brutish Khorne, obviously. H-he never calls...
• Bro god - Tzeentch, although that's mostly because he's the least icky of the Chaos gods. His/her/their friendship with Nurgle is a bit questionable since he stole Isha during Slaanesh's proverbial and... literal raping of the former Eldar Empire, though it isn't shown anywhere that Slaanesh still openly detests Nurgle for that (Hell, their daemons temporarily joined forces once or twice). Generally the most open to working with the others.
• Love Interest - All of them. Still pines for Isha, and is depressed no one ever seems to love him/her/them back. Tries to tempt Khorne into raping him/her/them. Gave up on Nurgle after he got married. For a long time has been pining for Tzeentch of all people, but she can never seem to make him think she likes him as more than just a friend. Basically, she's the hot chick who got friendzoned by the nerd. But he/she/they won't give up!
• Dedicated Chaos Space Marine Legion - Emperor's Children. Also has others to call on like The Flawless Host (their drugs make Emperor's Children's look like baking powder), Violators (these guys body sculpt themselves enough to make a Tzimisce well up with pride), as well as, again, various IG-equivalent armies.
• Warriors of Chaos "Hero"/Chaos Tribe: Sigvald the Magnificent (he really is quite magnificent...), Dechala the Denied one, former high elf maiden turned into near greater daemon level, Azazel, former bro of Sigmar, Styrkaar of Sortsvinear. The Varg tribes serve him. NO WE DON'T. Likely that the Hung worship him/her/them, purely judging from their nomenclature. Also, Dark Elves, pre-retcon.
• Sacred Number - sex 6. Probably 69 and 420 as well, due to what they’re associated with.
• Adjective - Slaaneshi

• 

  A Slaaneshi-Heretic Astartes of the Emperor's Children Traitor Legion.

Tzeentch

Change we can all believe in...

Tzeentch is the god of Just as planned, being a wishy washy nerd, and magic, arguably the coolest and most potentially powerful of the four due to being nerfed from his actual true power in the height of his age of coming from both respective canons of Warhammer and generally being the most victorious when fighting against humanity and other races as a scheming jerkass. Tzeentch is formed from paranoia and plotting, but also, amazingly enough, hope and ambition. Other values include trust, curiosity, dissatisfaction, aspiration, progress, knowledge, learning, protection, will, anarchy, and change.

• Gender - Always changing, but usually male or genderless.
• Main Enemy - Nurgle, because he symbolizes stagnation, a.k.a. refusal towards change. Khorne as well, as the jock bullies him for his nerdiness, which is what Tzeentch wants you to believe, in truth he bullies and torments Khorne.
• Bro god(dess) - Slaanesh, who isn't as brutal/dumb as Khorne and not as much of a lazy bastard as Nurgle. Plus, he/she/they're nice to little Tzeentch! Cegorach might have a Shonen Rival Bro Bond with him when they dont fight on different teams.
• Love Interest - Kind of wishes that the Deceiver, Cegorach, and the Emperor were chicks. For female gods hes got an Eye for Arianka since she's a rival to his whole all play to her all work dynamic and wants her to be the Isha to his Nurgle.
• Dedicated Chaos Space Marine Legion - Thousand Sons, and basically no other Space Marine groups; only The Scourged are canonical non-TS-descendants who are dedicated to Tzeentch. Tzeentch also apparently doesn't have any IG-equivalent armies dedicated to him in particular (besides the Prospero Spireguard who are more like the Thousand Sons auxilia than anything else). In-universe this is most likely because if a Guardsman is going to turn to a specific Chaos god, the prospect of power and unending glorious conquest, freedom from all pain and suffering, or all the booze, drugs and whores you can handle and then some are more attractive options than being a scheming nerd. Or else Tzeentch's non-marine cultists are rarely warriors or soldiers, more often power-hungry bureaucrats, nobles, Imperial Governors, and even Inquisitors. Out of universe it's hard to make Tzeentch-focused units other than TS when their signature units are sorcerers, who only come in small quantities on the tabletop, and the Sons-specific Rubric Marines. He also offers limited knowledge of the future, represented in game with a boosted Ward save from the Mark of Tzeentch.
• Warriors of Chaos "Hero": Vilitch the Curseling Egrimm van Horstmann. No Chaos Tribe seems to revere him to any exceptional extent (well there was this Sarl tribe and it was ruled by a Tzeentch chieftian, but Wulfrik killed him as well as his son) but he pulled out some nasty tricks such as becoming the grand magister of the Order of Light and fucking said order up before flying away on top of a dragon. Also, got Cathay in a bag.
• Sacred Number - 9
• Adjective - Tzeentchian

• 

  A Tzeentchian Chaos Sorcerer of the Thousand Sons Traitor Legion.

Malal

Then we have this motherfucking out of place/odd one out weirdo here....

Though not as relevant as the other big four, Malal is still more notable than the other minor Gods mentioned below. He's sort of the borderline between major and minor chaos gods.

Malal is a renegade Chaos god that only appeared in one comic for Fantasy before his creators divorced and took their character with them, resulting in GW shitcanning most of the original sculptors and artists. Then he was replaced with two entirely different characters with the same basic domain before being quietly swept under the rug and forgotten, barring the odd reference that slips out here and there. He is fittingly the god of fractiousness and dissent, which means his power is parasitic: any time the four other major Milky Way Warp gods do their thing, which is to say strive to gain power at the expense of the materium and eachother, Malal grows in power as well. Because of his nature as a common enemy to the big four and thus a Warp Entity that fights the Warp, he is also sometimes a god of atheism, contradictions, and paradoxes, when he exists at all. That being said, he did have awesome champions who lived solely to hunt down the greatest champions of the other gods, which is pretty Awesome. Sadly (or not, depending on your opinion), Games Workshop idiotically lost the rights to his name, so he's been more or less retconned. Except now he might be back in 40k, with a Chaos Space Marine warband called the Sons of Malice who worship a god called Malice...who just happen to wear a color scheme of black and white, and just happen to have a symbol of a bisected skull, and whose premier Chaos weapon specializes in killing Daemons. There's also Beastmen of Malal in one of the card games. But nope, don't you dare say they worship Malal. Like Khorne, Malal has an aspect of hate, however it's more along the lines of loathing (including towards self), malice and cold contempt compared to Khorne's ragey hot-blooded variety. While a worshipper of either might shoot up a school, a malal worshipper would probably think of it like exterminating pests rather than a pleasant rampage. Beyond all that, his portfolio includes paradoxes, justice, revenge, nihilism, and the inevitability of Chaos turning upon itself. Every time the others fight or power shifts between them, he grows stronger. Just like Chaos will eventually win and consume all worlds, Malal will eventually win and consume all Chaos resulting in oblivion for all things...then if GW took the full bite off Moorcock's work and not just the parts they wanted, the whole thing starts all over again from the beginning.

• Gender - Maleal
• Main Enemy - EVERYONE. Because Malal's an edgy loner who doesn't play by the rules (also because he represents one of the few things GW didn't steal from Moorcock, that Chaos eventually destroys itself), although the forces of Chaos Undivided might logically be prioritized over other folk.
• Bro God(ess) - Probably any character that has been retconned away, that is angry about not being a part of the canon anymore. A story where he temporarily joins forces with someone like Emps or the C'tan might also work.
• Love Interest(s) - As per his nature as an edgelord, he has a tsundere love-hate relationship with chaos itself.
• Dedicated Chaos Space Marine Chapters - Sons of Malice. And that just about sums it up. No Imperial Guard equivalent, no daemon spawn, nothing (that we know of). So yeah, that pretty much makes him a god of hipsters too. /tg/ has made a fan-codex for Malal Daemonkin, though, so go help yourself :)
• Warriors of Chaos "Hero"/Chaos Tribe: A fellow named Kaleb Daark was Malal's first revealed servant, who swung around a pterodactyl head on a stick. The Ogre Skrag the Slaughterer fucked up dwarves in his name before pussying out to follow some shitty Ogre god thanks to retcons. There's a small tribe of Beastmen named the Claws of Malal as well.
• Sacred Number - 11
• Adjective - Malalic

• 

  A Malalic Space Marine

Great Horned Rat

Thinks he's better than sliced Jesus.

This otherwise-unnamed deity is patron of the Skaven, and god of... well, rats. He also infringes copyright on both Nurgle's and Tzeentch's portfolios, but it's mostly rats. The Horned Rat once appeared in material form; he's the only Chaos god to do so. Of course, in Skaven fashion, he just ate a ton of the Skaven present, gave some orders and left; the Skaven only serve him out of fear, even though their belief in him only makes him stronger. He left them with a warpstone monolith containing the Skaven equivalent of the Ten Commandments.

In Age of Sigmar he was promoted to Chaos God following the demotion of Slaanesh out of the Great Game.

• Gender - Referred to as male.
• Main Enemy - Everyone, backstabbing is his primary creed and portfolio. Being cowardly, he will also work with any Chaos God, mostly Nurgle. Archaon shows him the least respect, however.
• Bro God(ess) - Nurgle, as far as his followers are concerned. They have very similar hobbies.
• Love Interest(s) - As Skaven themselves are incapable of feeling love, it is unlikely GHR can either.
• Dedicated Chaos Space Marine Chapters - None. Great Horned Rat does not exist in 40k. Although there are Death Guard miniatures with Skaven heads.
• Warriors of Chaos "Hero" - Clanrats. All of them. ALL OF THEM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Also apparently Thanquol, because the Great Horned Rat thinks his fuckups are hilarious.
• Sacred Number - 13

The Other Ones

Older editions of Warhammer Fantasy and 40k mention several lesser Chaos gods. Nowadays, they only appear(ed) in WFB (and even then, only sparingly), with some (the Horned Rat and Hashut in particular) generally considered to be separate from the "main" Chaos pantheon.

Until the Horned Rat replaced Slaanesh as the Fourth Chaos god in End Times. This change did not affect 40k.

Warhammer Fantasy

Ashedte'gash

A Minor Chaos God who was once an orphan on the streets of the Empire, who grew up learning that strength and cleverness are what allows one to survive, and that those who are weaker and stupider should be climbed over and killed to serve their betters. As such, he is served by only a few Greater Daemons, as the Lesser Daemons that followed him were all killed off for realsies in the Warp by their betters in an Ayn Randian survival-of-the-fittest natural selection murderfest.

Ash has only a handful of Greater Daemons serving him. All of the lesser daemons were destroyed in the ever present struggles to prove oneself to Ash. The remaining daemonic servants of Ashedte'gash are heavily armored Greater Daemons, wearing plate armor, carrying giant two handed swords. Little is known of these foul servants of Ashedte'gash. They lack wings to fly, but except from this nothing is known, but of their great strenght at arms.

Atagro

Lord of Beasts, was once mortal but was risen to Minor Chaos God status by Shagraunt, another Minor Chaos God, deeds included slaying a Sandworm in Araby. Atagro is a huge vicious creature clad in glistening black armor and crowned with a fierce, horned helm atop his blackened, skeletal head. Atagro's eyes burn with a fiery luminance, and he wears a huge shroud-like cloak. Tormented, vaguely human wretches struggle and writhe to peer out from under its folds. Atagro's armor is decorated with all the symbols of chaos, as he was once their most powerful champion. His hands are filthy and rotted; capped with grim steel talons and dark metal studs. Atagro's weapon, Kagorr, is a huge tooth edged sword with a second blade extending from the handle. The mighty god wields the blade with whirling grace and deadly precision. Kagorr is the most powerful weapon of chaos ever created and less powerful blades of similar appearance are often granted to Atagro's followers.

• Storm Lasher (also known as Serpent-Giants, Twisting Punishers, or Lashing Gargantuans): These disgusting creatures appear as bloated gray skinned giants with long flailing tentacles for heads. The creatures have thick, two fingered hands with each finger ending in huge dark tentacles. Their short opposable thumbs are their only true fingers. The storm lashers are so named due to their affinity for lightning. Lashers whip their enemies with tentacles and make a sound like thunder when they run.
• Gull Grinder (also known as Raging Slug Men, Screaming Beasts of Frenzy',' or Atagro's Habitations): These creatures are among the more deadly of Atagro's demons. They appear as huge brown skinned strongmen with slug bodies for legs. Their enormous muscled arms end in the heads of lions and their own flat, bald heads are featureless save for beady black eyes and huge mottled beaks. The Gull Grinders attack by biting or spewing fireballs with their lion heads.
• Corpse Render (also known as Butchers of Atagro, Beast-Lords, or The Dark Titans): The horrifying Corpse Renders are absolutely Atagro's most powerful greater demons. They look like massive 20' humanoids with black skin and the heads of rhinos. The Corpse Renders arms end in spherical masses of dark, twisted blades which spin and rotate at the will of the demons. The Renders awesome muscular legs end in flattened black hooves which they may scrape across the ground as they snort in anticipation of a coming fray.

Be'lakor

The first Daemon Prince and ostensibly the only Daemon Prince of Chaos Undivided, Be'lakor commands a great amount of power over the Realms. While still under the thumb of his four parents, he has been able to control a sizeable army of followers and has claimed to have even influenced Archaon.

Hashut

Hashut apparently means "Father of Darkness" in Dwarfen, which naturally means he's the god of the Chaos Dwarfs. And if his followers are any indication, he's also god of penis-compensating hats.

Khakkek

From old-school Warhammer, was the god of the Chaos Goblins. Was only mentioned once or twice, but was described as a red skinned, 8 limbed spidery-goblin who was a god of bloodletting but unlike Khorne, allowed for magic. Described as seen as halfway between Khorne and Khaine.

• Greater Daemon: The Great Demons of Khakkek feature an almost Goblinoid physiognomy, so they can be easily mistaken, from afar or in poor light, for an Orc (albeit very large). On closer inspection, however, we discover glowing red eyes, Chaos armor, and an impressive number of sharp teeth and claws (including a nice pair of fangs). His face can mirror Khakkekk's, and he wields a fiery giant sword with immense skill. Its characteristics are the same as those of a standard Minor Demon.
• Lesser Daemon: Just as the Big Demon looks like an Orc, Orc, the Little Demon looks like some kind of Goblin. He too, from afar or in poor light, can easily be mistaken for a Goblin (albeit tall), with red eyes. His face and impressive array of dangerous teeth and talons (no fangs) are also reminiscent of Khakkekk. Its characteristics are similar to those of a Minor Demon.
• Daemonic Beast: These creatures, sociable in the manner of the Nurglings, appear as Brats with glowing red eyes (this is the common characteristic of the demons of Khakkekk, with sharp teeth and talons) and sport 1d4 Chaos mutations. Like other demons, each has a face that strangely recalls its master. The profile of a Demonic Creature is the same as a standard Servant Demon, or, alternatively, that of a Nurgling (if you have Realm of Chaos: the Lost and the Damned).
• Daemonic Steed: Khakkekk's Demonic Mount appears virtually identical, at least physically, to a Large Wolf, and it may actually be. Whether or not this is the case, it is virtually identical. You can therefore use the description of the Big Wolf from the bestiary of WFRP1 or that of present in this project.

Kweethul

Kweethul Gristlegut was a Skaven who managed to become an extremely minor Chaos God in the older Warhammer editions. He was later mentioned as being a HERETIC against the Horned Rat in a later Skaven army book. The Horned Rat will suffer no challenger to its dominion over Skaven-kind! Could create his own Daemons, too.

• The Six Eyed Slayer: Greater Daemon. He stands about 10ft in height with a pair of three eyed goats heads. It carries a Chaos Weapon with the power of mutation.
• Floating Horror: Lesser Daemon. Appearing much as a Harpy but with the clawed feet of a Bear.
• Fire Runner: Daemonic Steed. A partially feathered beast with burning clawed feet.
• The Thing: Daemonic Beast.

Meneloth

An androgynous god of pleasure among the Elves, may have been a sort of proto-Slaanesh before being absorbed into the greater whole of Slaanesh upon Slaanesh's birth, either that or a toned-down aspect of Slaanesh used to lure Elves into worship of Slaanesh, like a dealer giving a watered-down needle of heroin to a kid to get them addicted before giving them the hard stuff.

Necoho

/tg/ has recently deduced Necoho's true identity.

Necoho is the god of atheism and one of the other minor gods invented as a replacement for Malal. Stupid as it sounds, it actually works, as Chaos is a reflection of all human beliefs and emotions, including, paradoxically, disbelief. He generally works to make religious movements disappear and wears a permanent expression of comic amusement, as he fucking knows he's a walking, talking paradox.

Note that Necoho was introduced in an adventure for Warhammer Fantasy Roleplay 1st Edition, so his current canonicity is doubtful, to say the least. That being said, he has been mentioned sporadically since then, such as the Gotrek & Felix novel Road of Skulls, which is more than can be said for Zuvassin. Has been mentioned by name in the Age of Sigmar novel Auction of Blood, along with a mention to his cult and an antitheist tract called "The Revelations of Necoho, or the Light of Doubt".

In the popular series If the Emperor had a Text-to-Speech Device, Magnus the Red made the point that the Emperor was, perhaps unknowingly, feeding a Chaos god of unbelief by promoting his Imperial Truth.

Obscuras

Brother of Alluminas, Chaos God of Law. Was originally one of the Gods of Law but got jealous of his brother and turned to Chaos proper.

Shadowphytes (also known as Shadow Daemons) are daemons of Obscuras, standing around the height of an average man. The most dedicated of Obscuras' cultists hope to join the ranks of the Shadowphytes upon their deaths. Shadowphytes appear as black shadowy humanoids whose features are only barely visible through the inner darkness they radiate. They cannot fly but possess the ability to melt into the shadows in one place and reappear in the shadows somewhere else within their line of sight. They fear the light and it is know to cause them actually damage when not standing in full or demi-darkness.

Shadowphytes can't cause physical wounding upon their victims, but cause damage through their touch, which robs the victim of his or her strength, and they are skilled users of the magical art of their master. It's said that anyone slain by a Shadowphyte is condemned to eternal torment in Obscuras' realm of shadow.

Oubelgyr

Oubelgyr is a Daemon-Prince who sits at the cusp of just-about-to-be-but-not-quite a Minor Chaos God, who is known to be a Peddler of Knowledge, like some sort of Daemonic Informant. Whereas Tzeentch is all about learning and then coveting secrets, Oubelgyr is always trying to find secret knowledge then sell it to the highest bidder, a trait useful for Chaos Sorcerers with sacrifices to spare who wish to skip the chanciness of Tzeentch's blessings. Was inprisoned at one point, but was able to scheme a way to unlock the door to his prison, only to then decide his prison was a nice lair and pretended to still be locked in. Rather than having daemons of his own, he has multiple Daemons and Mortal slaves who he has bound with contracts, who have to do as he says and guard him.

Quorn

Not to be confused with Khorne, Quorn was the Minor Chaos God of carnivorous plants, whose schtick basically was "Radical Anti-Veganism" with carnivorous plant life devouring all flesh-creatures. His name was a double-pun, meant to sound like Khorne's and the same as a vegetable-based fake-meat substitute from before Impossible Meats were a thing.

Rhasneth

The Chaos God of Insanity. Must be pretty batshit insane if his brand of nutters stands out amongst the general mental sickness of the rest of the Pantheon of Chaos.

The daemons of Rhasneth are to varied to make a single name for them, the most horrible nightmares of the most twisted madmen made real, pushing their way from the realm of nightmares into the world of the living to do their master's wish. The daemons of Rhasneth are special in that not all can see them, only those who have already lost their sanity can see them while all others fail to even notice them. The madman can scream in terror when his nightmares comes for him, not only to haunt him in his dreams but to feast upon his soul, while the rest of the world remains ignorant of the creature and tells him there is nothing there. Even as the daemon slowly approch, a mad twisted snarl upon its face...

Screaming God-Child

Appearing only in the Malus Darkblade novel Lord of Ruin, the God-Child is the ruler of a little corner of the Realm of Chaos known as Alterity, a massive chunk of rock on top of which lies walls in the shape of an eight-pointed star, guarded by ancient daemons who keep the locals and guests who enter from leaving Alterity. The God-Child himself takes the appearance of a young humanoid being with a near featureless face, only having a mouth, wearing robes and an amulet in the shape of the star of Chaos.

Shagraunt

A Minor Chaos God of whom even less is known of than Atagro, it was Shagraunt who ascended Atagro into the ranks of the Minor Chaos Gods.

Stromfels/Mermedus

Whilst often speculated to be Manann's edgy dark half, Stromfels' mutant cults and rumored links to Khorne in earlier editions point towards his status as a minor Chaos god. Further proof of this is his patronage of sea mutant pirate Aranessa Saltspite, and his Chaos cult in the Gotrek and Felix story "Slayer of the Storm God", featuring his avatar, the "Harbinger of Stromfels".

Another variation of Manann but Chaos exists in the form of Mermedus, the Norscan god of the sea, that's considered by some to be an even more edgy version of Stromfels. Notable that most Norscans don't even like him, because all who die at sea are claimed by him and denied entry to their patrons realm, except for the Skaelings who drown prisoners of war and animals for him after battles and raids. He's described as a ghoulish and bulbous figure that walks on the sea floor, covered in eyes and bloated like a drowned person.

In Total War: Warhammer II, he is also Cylostra Direfin's patron deity, having resurrected her as a vengeful ghost to wreak havoc against the High Elves and Bretonnians who rejected her singing.

In Age of Sigmar, he apparently is still worshipped by pirates in one area of Ghyran, and was worshipped by a tribe of Gargants in Azyr before Sigmar cleansed the realm of Chaos.

Tristaris

A Chaos Goddess of Misery, with a minor interest in knowledge. Represents the misery brought about by knowledge of Chaos' ultimate victory. Sounds like Tzeentch's perfect girl, a big tiddy goth nerd GF.

• Blissbane: (also known as Wailing Woman of Misery,Mistress of Destress, or Gaunt Spirits of Lamentation) This infernal creatures look like haggard, ghostly women with wild hair and gaunt, wrinkled bodies. They wear white shroud like clothes and are translucent to the eye. The Blissbanes emit occasional shrieks of pure misery as well as sudden bursts of maniacal laughter. They can pass through any obstacle as though they were ethereal, but are also incapable of manipulating any material objects. Often Blissbanes appear in groups of four, the number of Tristaris.
• Sloathe: (also known as Mounts of Misery, Hunching Beasts of Suffering, or Steeds of Tristaris) The sloathes are bear sized creatures with four legs and short curved claws. The creatures have no heads and appear to be made almost entirely of layer upon layer of dark rags and shrouds. They make low grunting and grumbling sounds as they walk. The sloathes lash out with their claws in combat, and they have the ability to collapse into a pile of useless rags. The rags may be scattered by the wind or even burnt up; but unless every single one of them is destroyed the creature can return to its normal shape from any one of the pieces.
• Humanwood Tree: (also known as Oaks of Despair, Petrified Eyes of Torment, or Roots of Evil) The humanwood trees are powerful demons that largely inhabit the groaning forests of misery in the pocket dimension that is Tristaris's realm in the chaos warp. The trees look like stubby, twisted oak trees with thick trunks and anguished human faces and bodies seemingly squirming about beneath their flexible bark. The trees speak a language that is their own and to hear it is to surely lose one's mind. All who hear the trees speaking will feel suffer from it as blood pours from their ears. The trees lash out with their branches and should the victom be caught the trees nine limbs will easily rip a held person to shreds. Strangly enough they are also immune to fire, somehting that would otherwise have been their main weakness.
• Sade: (also known as Screaming Devils of Sorrow, Sobbing Lords of Tribulation, or Jeering Lords of Languishing) The Sades are Tristaris's greater demons. They look like gaunt red skinned men with long black beards, tiny horns from their foreheads and pointed chins. The Sades dress like nobles and their eyes are white and constantly streaming with bloody tears. Each of them carries a large, gleaming sickle. They also each carry a Lash of Lament and have long claws which they can use in close quarters. The Sades must consume twice their weight in living hearts each day that they exist in the material world if they are summoned.

Urlfdaemonkin

Urlf isn't a name. It's the last fucking death cry a guy makes when you gut him. That should tell you all you need to know. Anyway, this guy used to be a Norscan (like most of the daemon princes on this list) and was elevated to princehood by Khorne for exceptional badassery. Before his ascension, he was a massive, tall, bearded, Clint Eastwood-type Chaos Champion and was a chieftain of the Snaegr clan of Aeslingr. He's so fucking powerful that he was able to create his own lesser daemons and can bless warriors with the Mark and mutations of Khorne. Urlf has his own summoning days like most powerful daemon princes, and is usually worshiped as a lesser deity of Chaos by those who serve his master, Khorne. He has a short story in the 6th edition Chaos army book, where he muses on the fuck-you nature of time in the Warp and remarks on how the new Chieftain of the Snaegr resembles one of the sons he fathered in his mortal life. He also blesses the new chief with Khorne's mark and turns him into a monstrous cross between a Bloodletter and a Chaos Champion.

Vymnn

A Minor Chaos god who was only known as the master of the Daemon Prince Hakrii, who Atagro slayed (Hakrii, not Vymnn) in his quest for Daemon Princehood himself.

Zhedun

A Chaos God of gnawing, eternal hunger, who represents how Chaos would destroy itself if it ever won in the end, being dependent on sapient mortal thought for sustenance.

Daemons of Zhedun are known as Devouring Fiends (a.k.a. Mawed Ones, or Devourers) creatures ruled entirely by their own voracious appetite. They stands well over six feet tall, stooped, with atrophied arms but strong legs, and their heads are comprised mostly of a giant gaping jaw filled with massive teeth. Often they will stop at fallen foes, devouring their bodies in their Chaos-spawned hunger.

Zuvassin

Zuvassin is one of the two minor gods invented as a replacement for Malal. He just likes to see shit fall apart, specifically nonphysical stuff like schemes and lives - in other words, he's the god of not as planned. He's the guy who makes all the bad shit happen in infomercials. Generally, he makes sure that Murphy's Law is always enforced in the most spectacular possible ways. He doesn't have many worshippers, as he makes sure to fuck up whatever they're planning too.

Note that Zuvassin was only introduced in an adventure for Warhammer Fantasy Roleplay 1st Edition, so his current canonicity is doubtful, to say the least.

Actually, he is still canon, at least in Warhammer Fantasy. The 2nd Edition "Tome of Salvation" lists both him and Necoho as Chaos Gods.

And the motherfucker is STILL canon in Age of Sigmar, where a short story features a Chaos Champion named "Zuvass". Hmm.. I wonder who he might be worshipping.

Makes an appearance in Total War: WARHAMMER III, where Daniel can get an event where you can communicate with him and get his blessing, as he considers you important in disrupting the balance of Chaos.

Ziraad, Thain, Blazzach and Javate

4 Minor Chaos Gods known among the people of Araby, mentioned in Atagro's backstory as the gods worshipped by 4/6 members of his BATTLE-HAREM, the last 2 being a one of Tzeentch and one of Slaanesh.

Warhammer 40,000

Balphomael

A minor Chaos God skirting on the edge of independent Greater Daemon, ruler of the Daemon World of Woe. Has a Christian Devil, "Let's Make a Deal" sort of vibe about him, complete with looking like classical illustrations of Demons and his name being a portmanteau of Baal, Baphomet and Samael.

King in Rags and Tatters

Quite possibly a Chaos God version of Hastur from the Cthulhu Mythos, may or may not be a guise of Tzeentch. Leader of the "Menagerie" a Chaos Cult that seeks to unravel reality itself. Has unique demonic minions in the form of Warp Spectres, roiling, constantly changing masses of hideous-energy-being Daemons (like a Chaos Spawn made of gas and energy instead of fluid flesh?).

Lord of Misrule

Another minor Chaos God skirting on the edge of being an independent Greater Daemon from Dark Heresy. Also seeks to undo the veil between reality and the Warp.

Melkirth

Mentioned in older background material for Warhammer 40,000. Melkirth was a minor chaos god described as "The god of evil, malice, and wanton cruelty and suffering." While Melkirth remains a minor god, it is said that the actions of the mortal races, particularly the Dark Eldar, are causing Melkirth to grow in power until he ultimately becomes the fifth major Chaos God. The daemons of Melkirth are described as being the colour of shadow and able to take on the appearance of any daemon, be it a daemon of Khorne, Nurgle, Slaanesh, or Tzeentch. These shadow daemons could be inspiration for the shadow daemons Morathi encounters in Ulgu in Age of Sigmar, as they are also having to do with Dark Aelfs.

Mo'rcck, Phraz-Etar, and Ans'l

Puns on the last names of sci-fi and fantasy author Michael Moorcock (from whom the idea of Chaos as a fundamental force in the world was blatantly stolen/took inspiration from, and don't anyone ever say "borrow for a while" since even the author and Games Workshop have admitted it), artist Frank Frazetta (who drew a lot of movie and comic book posters, especially in sci-fi and fantasy), and Citadel Miniatures founder Bryan Ansell (who wrote several of the First Edition rulebooks). These guys helped set the tone of the early Warhammer 40,000 universe (purposefully or not), including the propensity of putting spikes on Chaos things. Games Workshop decided to pay homage in the (initial) Third Edition Codex: Chaos Space Marines, which mentioned that Chaos Space Marines often put "spiky bits" on their armour in praise of these three gods. They were never mentioned anywhere else, and probably shouldn't be considered "canonical"... not that canonicity counts for much in 40k anyway.

Raptor God

The minor god worshipped by the Chaos Raptors, responsible for turning them from standard Assault Marines to the mercenaries they currently are, and maybe also the one that turns them into Warp Talons.

Age of Sigmar

Archaon

Upon completing a new set of challenges by the Chaos Gods in AoS, he was empowered to demigod level and given free reign to do whatever he desired.

Devourer of Existence

A primitive aspect of Chaos as an apex predator, that wishes to devour all else and despises any sign of civilization, worshipped by the Untamed Beasts. Maybe a modern take on Zhedun?

Eightfold Watcher

Some sort of Chaos-Spider-Godbeast worshipped by the Tarantulos Brood. From Warcry Red Harvest.

Ever-Raging Flame

A massive fire of Chaos, said to be the Chaos personification of Aqshy itself, worshipped by the Scions of the Flame in the Realm of Fire.

The Great Gatherer

A (presumably) giant crow worshipped by tribesmen from Ulgu in the Age of Sigmar. Not much is known about him, since the only game his followers appear in isn't out yet, but we do know that the Corvus Cabal (the aforementioned tribesmen) consider Archaon to be his avatar in the Mortal Realms. Theories range from it being an aspect of Tzeentch (notable avian features, Tzeentch is known to be interested in the Realm of Shadow, maybe gathering secrets?) or Nurgle (the Crow was Nurgle's totem animal among the Norscans, maybe gathering bodies?) to being a minor, but ascending, Chaos God not so far removed from the Great Horned Rat's path to the pantheon. He even has the weird connection to both Nurgle and Tzeentch the GHR does. It has been confirmed that the Warbands from Warcry will be usable in the main game, possibly as normal units, and will have the keyword SLAVES TO DARKNESS, which means he'll have some representation in a mainline game. Not too bad for the newest kid on the block.

Morghur

Originally one of the most notable Beastmen, he's worshipped as a minor Chaos God of mutation and devolution in Age of Sigmar. Wait what the fuck is this??

Nagendra

Originally a Godbeast, was splintered and the remains corrupted into Daemons called Coiling Ones, worshipped by the Splintered Fang.

Blood Bowl

Nuffle

A joke Chaos God for Bloodbowl, Nuffle is a mispronunciation of NFL (as in "National Football League", the American gridiron football pro league in real life), which would be pronounced "Noofle" as in "book" if you tried pronouncing it. Nuffle explains why the Blood Bowl universe is so wacky and gridiron football obsessed. Technically the superior to the rest of Chaos, although apparently only in the Blood Bowl universe.

When Tzeentch was the best

According to recent Tzeentch Codex/Battletome Tzeentch was at one point the sole major chaos god. A rebellion against him fractured him into many pieces, which because of warp time fuckery, technically counts as a different god. When chaos was first forming (just after War in Heaven for 40k) there were many chaos gods and entities competing (rather than the total domination that exists now). Tzeentch somehow became number one, and was a super god of sorts, although he was possibly less powerful than the current Tzeentch due to the lesser size and influence of chaos. A rebellion by all the other chaos gods fractured him, creating the Tzeentch we know today. In the same way that Slaanesh has always existed in 40k, the new Tzeentch has always existed the way he is. While the old Tzeentch is permanently destroyed (across all time), while still doing the things he did, what really matters is the influence in the material realm: Tzeentch's new self and Slaanesh started doing that when they were created relative to the materium, while the Warp is such a mess that a contradiction like old Tzeentch being completely destroyed while still having done the things he did is basically nothing. They are implied to be two seperate entites.

This is a variant of the backstory of The Blue Scribes.

The Chaos Gods of Warhammer 40,000 and Warhammer Fantasy
Four Main Chaos Gods:	Khorne - Nurgle - Slaanesh - Tzeentch
Other Gods of Chaos:	Archaon - Hashut - Horned Rat - Nuffle Malal - Morghur - Necoho - Zuvassin
Chaos Gods of Law:	Alluminas - Arianka - Solkan the Avenger