Doels are tiny, flesh-devouring creatures who inhabit an alien dimension shrouded in night and chaos. They have three forms, a mist-like form, an elongated pale limb-like shape, and the brain burrowing parasite form. They attack by burrowing into the victim's brain and feeding off the contents. The victim of this may experience powerful hallucinations before a painful death. Fire and the cross-shape have proved effective against them.