Uncontrollable Mutation
(Rule)Description: The Horrors warp the world around them, turning foes into twisted masses of pulsing flesh and bone before a newly born Horror springs from the corrupted mess. This can only be cast on a single enemy unit in base contact with the Horrors. Roll a D6 for each Horror in contact with the target unit. Each roll of a 6 slays an enemy model outright, with no armour saves allowed. These hits are distributed amongst the models of the target unit just like shooting.
The spell can only be cast on roughly man-sized or smaller opponents, and so cannot be cast on Ogres. Trolls, chariots, war engines (though the crew may be affected), monsters or characters riding monsters, etc Normal cavalry models may be targeted.
Each enemy slain by this spell is turned into a Horror and added to the Horrors unit.