A chaotic tentacle-mouthed creature spawned from a failed experiment to grant itself immortality. Hollowgasts (typically referred to as 'Hollows') create auditory hallucinations to trick their prey and use the strength of their tongues to immobilize them.
An agile vampiric-winged creature succumed to infection by a parasite. These bat-like vampires are blind, using echolocation by making clicking sounds with their gills to hunt and navigate, which allows them to move in complete darkness.
A violent cannibalistic-mutated creature possessed by the spirit of the Wendigo. Wendigos see movement: mobile persons are highlighted in their vision, otherwise they are usually unable to track those who remain still. Their skin is stretched taut against its body, making it immune to ballistics and sharp weapons.