Editing Warhammer 40,000/8th Edition Tactics/Tyranids (section)

===Biomorphs===
*'''Adrenal Glands''': Adds 1" to the distance the model/unit can move when it advances and/or charges. '''This is amazing''', especially when combined with Onslaught, as the target model can benefit from it on both the advance and the charge for peanuts per model (a measly 1 point for non-{{W40Kkeyword|monsters}}, and only 5 points otherwise). Combine with {{W40Kkeyword|Kraken}} and movement boosting Stratagems, and that seemingly small bonus can make a big difference; relevant Stratagems include Metabolic Overdrive (which won't stack with Onslaught or allow charging), Overrun, and Opportunistic Advance (which is {{W40Kkeyword|Kraken}} only). Obviously, also combines well with the Swarmlord.
*'''Toxin Sacs''': Wound rolls of 6+ by the model/unit in the Fight phase cause 1 additional Damage. Use on models with low Strength. Situationally useful, but good synergy with wargear, like rending claws, which activates on the same condition, and obviously best used against multiwound models like terminators or, weirdly, vehicles, since they don't have keyword restrictions on what they hurt. Best when paired with {{W40Kkeyword|Gorgon}} for its access to Hyper-Toxicity.

====Carnifex-Only====
*'''Chitin Thorns''': Carnifexes and Thornbacks only, and mandatory on the latter. On a 6+, enemy units within 1" of the user at the end of the Fight phase take a mortal wound. Only costs 5 points, but doesn't do enough to justify that. Maybe if it was models it could be good, but right now just skip it. 
*'''Enhanced Senses''': Standard and Thornbacks can take this, but on the former, mutually exclusive with Tusks and two of the weapons (the maw or the bio-plasma). Boosts BS to 3+. An absolute must-have for any self-respecting Dakkafex, although the acid maw might still be worth considering if you suspect that your Dakkafex may be forced into melee and don't want to risk being caught with only the generic CCW.
*'''Spore Cysts''': Carnifexes and Screamer-Killers only, mutually exclusive with the spine banks. Imposes a -1 penalty to hit with ranged attacks against the user. It won't stack with Venomthropes, so it's like having a portable, built-in Venomthrope unit that frees up your actual Venomthropes to buff something else. Expensive at 10 points, but better than the spine banks, for certain.
*'''Tusks''': Carnifexes only; mutually exclusive with Enhanced Senses, Monstrous acid maw, and bio-plasma. On the turn you charge, you gain +1A. Great on any melee built Carnifex, because it won't have guns for Enhanced Senses to boost and unless you plan to go up against a fuckton of heavily armored units you probably won't benefit from taking the Monstrous Acid Maw.