She'ol, also known as the Netherworld, is the home of the Rephaim, described by Warden as a medial state between life, the human world, and death, the æther.

When the corporeal world became overpopulated with drifting spirits, deep rifts began to appear in the æther, forming cold spots that can be found by rhabdomancers. When the rifts became too wide, the ethereal threshold broke, making moving between the "veils" of these dimensions possible. According to Nashira Sargas, when Earth broke its threshold, it became exposed to She'ol, which in turn became accessible to the Emim.