A Chall, playing with one of their recreational bioforms as they converse with their human companion. Although such an act would be taboo in mainline Chall society, those outside it take great pleasure in ignoring such rules.

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After Old One Eye emerged from its icy prison, remnants of Behemoths lesser bioforms on Calth view it as their "alpha" & began rampaging throughout populace until stopped by Sergeant Telion

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During Octarius War, the Tyranids super-swarm tactics are ineffective against the Ork hordes. Prompting the Hive Mind to deploy more specialized bioforms, bio-titans, & eliminating Ork bosses.

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Mycetic Spores serve as "drop pods" for Hive Fleets. Hurtling from bioships into planets at high speed while carrying range of bioforms before smashing down on surface & unload its deadly cargo.

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goblins are the result of faulty bioformers extruding specimens before they've had a chance to mature physically or finish their prenatal indoctrination. the half-feral survivors toddle around forgotten corridors and spicules, preying on and becoming prey to other derelicts

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When threatened, Sporocyst will produce Spore Mine clusters or Mucolid Spores in order to kill or slow enemy's advancement until more combat-capable bioforms arrive to eliminate them

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Hormagaunts requires little synaptic guidance as their prominent role is to charge & slaughter any prey in it's path, as well forcing the enemies expend their attacks on them away from vital bioforms

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Sporocyst is a bloated fleshy bioform that after planetfall, will burrow itself to the surface & emits polluting microorganisms. Violently alter the planet’s environment to better suit for Tyranids

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Tyranid Gargoyles often used as shields for larger airborne bioforms such as Harpies or Winged Hive Tyrant. As flocks of them will protect and use it's own body to block incoming enemy attacks.

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Zoanthropes are powerful psyker bioforms believed to be created using Aeldari DNA. Capable projecting bolts of energy that boils through adamantium plate & disintegrate flesh with ease

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Hive Fleet Tiamet possess unique diamond-hard chitin composite that provides the bioforms excellent protection against energy and kinetic based attacks than any Hive Fleets.

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Swarmlord, an infamous & powerful Hive Tyrant, possess more mental autonomy than any bioforms, even other Hive Tyrants. Able to outwit the enemy & leading the swarm with more tactical approach

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NidFact:
Gargoyles are capable spitting caustic venom which it instinctively aim for prey's eyes, blinding them and making them vulnerable for Gargoyle's barbed tail attacks or other bioform's onslaught

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NidFact:
Vanguard bioforms such as Lictors & Genestealers are capable operating outside Hive Mind's Synaptic control, instinctively driven to what it's purpose on targeted world for the Hive Fleets

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NidFact:
Most Tyranid "weaponry" are living being itself and are symbiotically connected to the bioform in such unison that, in certain bioforms, it is difficult to determine which is actually the "user".

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NidFact:
Spinefist are connected to bioform's lungs via bioweapon's long tube-like "tail" & capable "firing" hail of neuro-toxin coated spines through the sharp exhalation of users.
(Essentially glorified blowgun)

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NidFact: Harridan is an enormous drake/wyvern-like bioform often acts as "brood mothers" for Gargoyles, guiding & carrying flocks of them on it's undersides to their enemy's destination to strike.

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NidFact:
Lictors exudes pheromone trail in which the larger amount of prey located, the stronger it's potency & attracts other bioforms to it's position. Not even killing Lictor will stop the alerted Tyranid pursuit.

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NidFact:
Impaler Cannon's spine shards each have small winged bioform called 'shard beast' latched on it that when fired, it'll "guide & steer" the shard to it's target with high accuracy even behind cover.

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