Gwyllgi are denizens of the dreaming realms of faerie.
Fey spirits of death and mortality, they stalk the darkest
wildernesses of the feylands, sometimes wandering into
forests in the mortal realm where the walls between
worlds are thin. Predatory and opportunistic, gwyllgi are
considered to be harbingers of an early death by scholars
and learned travellers, and they are prone to lingering
around places where the natural order of death has been
perverted or broken.