Amenth

Amenth is a black and dangerous world, full of endless hordes of daemons and primordial eldritch creatures. The living can only exist in that chaotic hellspace in some form because of Annihilation, an elder god with the power to control Amenth's armies. Annihilation exists in the form of the helm that allows her to possess its wearer, with only the exceptionally strong-willed retaining a degree of autonomy. Amenth can be accessed through Otherworld province of Dryador.