The Animus Speculum is a weapon used by the Culexus Assassin. It is capable of firing lethal blasts of negative psychic energy. By focusing the Assassin's aura through the single eye on the front, it becomes a thin beam of energy, burning the target's brain and sucking out its soul. These blasts can be deadly to anyone, but psykers who rely upon the warp for energy are especially vulnerable, and can potentially have their powers taken. The weapon also serves as a restraint, dampening the Culexus' negative aura to allies around them.