Warp Instability

Most Warp-entities have a tenuous hold on reality, often maintained only by horror and bloodshed, and can be disrupted if sufficient harm can be done to their manifested forms.
If a creature with this trait takes damage and does not deal any damage or Insanity points to another creature by the end of its next turn, it must make a Willpower test. The creature suffers 1 point of damage for failing, plus 1 additional point of damage for each degree of failure. If this would deal damage equal to (or in excess of) the creature’s wounds, it is cast back into the Warp.