Malfeas (AOS)

Some of the Primordials surrendered to the Exalted and the gods after the Primordial War, and were imprisoned forever outside Creation in Malfeas, a twisted kingdom of iron and black marble beneath a mad green sun. The demon realm is constructed from the body of the mightiest Demon Prince, Malfeas himself. The Yozis, as the imprisoned Primordials are known, constantly plot to escape the demon realm Malfeas and to overthrow the gods.