Umbra

A domain of darkness and endless caverns. Umbra is one of the only known domains with naturally-occurring portals between itself and the Prime Domain. These portals appear deep underground in the prime Domain, or high in the surface of Umbra. Creatures from Umbra tend to bleed into Prime through caves, leading to myths of dangerous horrors beyond one's comprehension shared by miners over the centuries.

Type

Plane of Existence