Pandemonium

Pandemonium is the plane between chaotic neutral and chaotic evil in alignment and has no native inhabitants but many that were either immigrants, exiles, marooned, or prisoners. The entire plane is made of passages and caverns seemingly carved from solid rock by the constant howling wind and wind-driven rivers.
Demons and quasits lived or hid here and shadow demons were plentiful. Cyric has located his Supreme Throne in Pandemonium. Gruumsh's realm of Nishrek, home to the orcish pantheon, is also located in Pandemonium.

Type

Dimensional plane

Location under

The Astral Sea