Knights of Blood

Knights of Blood
Battle Cry	Unknown
Number	maybe a few? They're all dead as far as we know
Founding	Unknown
Successors of	Blood Angels
Successor Chapters	None
Chapter Master	Sentor Jool (during the Devastation of Baal)
Primarch	Sanguinius
Homeworld	Unknown
Strength	Destroyed
Specialty	Heavy assault, overkill
Allegiance	Declared renegade by Ordo Astartes, nominally loyalist and considered such by Dante
Colours	Silver, dark red pauldrons, helmet, aquila, and main backpack

"Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven. Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward. But when thou doest alms, let not thy left hand know what thy right hand doeth: That thine alms may be in secret: and thy Father which seeth in secret himself shall reward thee openly."

– Matthew 6:1

A Successor Chapter to the Blood Angels, the Knights of Blood were a Renegade Space Marine Chapter. Although their frenzied warriors were dangerous to both friend and foe alike at least according to the Ordo Astartes, they still purged the galaxy of the Imperium's enemies and were quick to remind Loyalist Chapters that there is a large difference between "Traitor" and "Renegade".

The Knights of Blood Chapter suffered the same deficiencies common to many of the later founding successor chapters of the Blood Angels - to wit, the Black Rage and the Red Thirst. The Knights started a galactic crusade to purge the foes of the Imperium, but committed so many excesses in the course of it that they were declared renegades by the High Lords of Terra in the beginning of M41. As such they kept their distance from any allies, to protect those allies from both the Inquisition and their own deficiencies. Some chapters ignore this decree, refusing to accept any declaration of renegade status from any other than a Space Marine, but other chapters are extremely zealous in prosecuting outcasts. Though, even those zealous Chapters wouldn’t just take someone’s word at face-value that a Chapter was heretical/renegade and would investigate. Especially the word of a mortal. Notoriously untrustworthy mortals, in fact. Even though they're probably right...Well, there is the idea that they're supposedly killing humans to sate their flaws, but that’s practically normal for many Sons of Sanguinius. Several of their Chapters do it and that isn’t even considering the ones who act like that who aren’t even Blood Angels successors. The Knights of Blood are more like a consolation prize for the Inquisition as the Flesh Tearers and Flesh Eaters are too scary for them. Oh, they're probably guilty as fuck, but they're probably the only guilty ones the Inquisition isn't afraid of pissing off.

There have been rumours of the presence of the Knights of Blood operating in the Jericho Reach for several years, but they have never appeared on any officially sanctioned order of battle, and as far as can be ascertained, no communications have been exchanged between them and the Achilus Crusade's high command.

Story time!

In the short story, 'Reflection in Blood' by James Swallow, Sergeant Rafen and squad parley with a group of Knights of Blood who outwardly don't display signs of either of the twin curses (i.e. the Flesh Tearers sheer ballscrunchingly volatile anger barely restrained behind a mask). In fact they seemed quite civil despite one member of the squad being a dumbass and accusing them of being thieves along with renegades, as they had shown up in good faith to return a fallen brother's wargear and progenoids.

That, surprisingly barely got a rise out of them, and the leader, Ser Kord brushed it off. After things had wrapped up, Rafen asked the million dollar question, if they were willing to do this, could they not return to Baal with them? Ser Kord merely replied sadly "Baal has been lost to us." Then the dumbass asked them what was stopping them from slaying them for being renegades. To which Ser Kord merely smiled gently and the Epistolary that had been attached to the squad suddenly became aware of a COMPANY of the Knights of Blood that had been hidden by Ser Kord.

With no Psychic Hood.

Without even giving a whiff of corrupted sorcerer stench.

Without even sending off any red flags to the Epistolary that he was even channeling the warp, let along concealing that many men.

Let that sink in for a minute.

Needless to say Rafen and Co. beat a hasty retreat after--for such a blood thirsty chapter the Knights of Blood demonstrated a surprising amount of patience.

That being said Swallow's display of anything Blood Angels is questionable at best. In Devastation of Baal the Knights of Blood were almost completely fallen to the Red Thirst to a degree that their physical appearance began to change similar to the fallen brothers in the tower on Baal (the ones fallen to the thirst, not to the rage).

Conjecture

These scant few pieces of evidence lead many to speculate that their particular blood lust might just be an increased passion in the midst of battle which would concur with what a Novamarine captain encountered in the Novel 'Death of Integrity' by Guy Haley.

It also raises questions by their command structure. As Ser Kord had not been fitted with standard psyker gear they might need him to pull multiple roles, as their status as renegades would make it hard to recruit. They seemed fit, with no mutations to speak of, so there's only a small possibility that he gained them after. He could also be the Chief Librarian but not need to wear their standard gear. They could also have Chapter command set up like those bloody magpies. It might also have been technology.

Where are they now?

In 999.M41, the Knights of Blood were gathering near Baal to assist their founding Chapter in their defence of Baal against both the Daemonic hordes of Ka'bandha and the Tyranids of Hive Fleet Leviathan. Being branded as renegades, they kept their distance from the other Chapters during the battles as to not imperil any of their cousin chapters still in good standing.

The Tyranids 8e codex reveals that while under the command of Gabriel Seth, the chapter was wiped out to a man in a suicidal charge that prevented Seth and other successor chapters from being overwhelmed by the Tyranids and Ka'bandha's forces. This is corroborated by Devastation of Baal, which shows the same events from Gabriel Seth's point of view and shows a rather touching goodbye. Until that point, Seth and his Flesh Tearers had been actively avoiding the Knights of Blood, viewing it as a sign of mistrust from Dante that they be forced to fight alongside renegades and not alongside the primary force on Baal. However as the battle progressed, desperation forced Seth to team up with the Knights' Chapter Master Sentor Jool as Tyranids and Daemon overran their respective positions. It was then as all seemed lost that Jool revealed the truth of his chapter. As it turns out, the Flaw had begun to mutate them into monsters like those caged in the Tower of Amareo, and when Ka'Bandha arrived they had decided to use what was left of their self-control to die as Loyalists rather than being branded as renegades or being corrupted into the service of Khorne. Jool then explained that it was he who had requested to fight alongside Seth, knowing that out of all the sons of Sanguinius, the Flesh Tearers would understand their plight the most. Lamenting the fate of his Chapter and warning Seth that he too was at risk of following them into damnation, Jool led his remaining men in a mad charge against the combined might of the Tyranids and Ka'bandha. After shedding a single manly tear, Gabriel and his remaining Flesh Tearers evacuated the planet, narrowly saving them from the Black Rage. Sentor Jool perished at Ka'Bandha's hand, but not before personally refusing the Bloodthirster's offer of servitude in exchange for an eternity of bloodshed in Khorne's name.

Dante and Seth are later seen discussing the fate of the rebuilt Chapters following the arrival of Primaris reinforcements. Both confess that the Knights of Blood are too cursed to be rebuilt, their legacy still too tainted. Yet nevertheless, both acknowledge the Knights died as heroes and loyal sons of Sanguinius.