Entropic horrors are pure, chaotic demonic energies given form to lash out at all life.
In the RPG
An entropic horror looks exactly like an entropic beast and is just as insane. Its true nature becomes evident only when it engages in combat, for the unnatural fire that burns within it drains the life from its opponents. Like entropic beasts, entropic horrors attack any living thing they encounter, ruthlessly and without remorse.