Zoanthrope

The zoanthrope's body has been sacrificed almost entirely for the sake of its mind. Its limbs are vestigial, its physical form frail and hunched, kept aloft only through a crude psychic levitation that lets it drift across the battlefield rather than walk it. Every resource the creature would otherwise spend on muscle or bone has instead been poured into a monstrously overdeveloped brain, swollen with raw psychic potential.

This sacrifice grants the zoanthrope terrifying utility: it can unleash devastating blasts of warp energy capable of tearing through armor that shrugs off conventional weapons, and it serves as a powerful node within the swarm's synaptic web, projecting the Hive Mind's controlling influence with an intensity few other bio-forms can match. Zoanthropes are rarely seen without an escort of lesser creatures, for their combat frailty makes them a priority target the instant an enemy recognizes what they are.

Some Imperial savants who have studied captured specimens report an unnerving sense that a zoanthrope's mind, though utterly alien, carries fragments of every battle the Hive Mind has ever directed, as though the creature is less an individual than a small, humming shard of the vast collective intelligence that commands the entire swarm.