The Abyss is a plane of evil and chaos, made of infinite layers stacked “like pancakes”, each with its own lord or malign ecology. Its dominant powers are demon lords such as Graz’zt, Pazuzu, Orcus and Demogorgon. The damned who die there become larvae, the currency of tortured souls.
It holds dust wastes, lakes of molten iron, metal boils serving as fortresses, and red plains of portals. Broken Reach is the access sector to the realm of Axum. See also Azzagrat.