Rutterkin

The rutterkins were grotesque and disfigured demons of the Abyss that hunted in mobs in search of victims to devour.

Combat
The rutterkins would overwhelm the intruders in their realms with a paralyzing wave of fear while surging forwards in a mob.

Society
Rutterkins generally roamed the hells of the Abyss in vicious murderous mobs.

Ecology
These demons' main purpose was hunting down non-demons that ended up in the Abyss. These deformed creatures were carries of the Warping Plague, infecting the victims with a bite. The bitten experienced debilitating symptoms such as pain and tremors, while their bodies were wrapped and disfigured by the Abyss' taint. The victims' flesh was twisted and shifted around the bones transforming them into abyssal wretches.