NidFact:
Rippers are simple bioform which lack digestive systems themselves & have minimal organs inside, ensuring it have enough "space" for consuming and storing more biomass within them.

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NidFacts:
Tervigon use as one of Bio-ship's defense measures where it wanders inside & when detect intruders it'll spawn hordes of Termagants to repulse the enemy until Bio-ships spawn more capable bioforms

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NidFact:
Tyranid Prime, an apex Warrior-strain, while not as powerful its still capable leading entire swarm as Hive Tyrant would when said bioform or other leader-beast absent or killed. (Tyranid ver. Lieutenant)

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NidFacts:
Hive Guards use low telepathic ability to "see" through other bioform's eyes to locate enemy & enable it's Impaler Cannon fire "living spine shard" home into their target even behind cover.

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NidFact:
Malanthropes are very rare bioform only seen far behind Tyranid's assault collecting prey's genetic materials for Hive Fleets & may be responsible for Norn-Queen creating new bioforms

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Nidfact:
Sporocyst, while used as one terraforming method, also serve as "psychic resonator" where it boost synapse creature's synaptic range. Thus expanding Hive Mind's influence over lesser bioforms.

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Random sketch based on the bioform weapon Rex from ’s novel “Dogs of War”.

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Space orcs, known as Bioform: ORC, are bio-engineer by the Human Sphere for heavy space colony construction and labor, later use for military use, gain rights by the USA and Pacific Federation after the formation of the United Federation.

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