Forgotten Realms [Faerun

Nessus, the Nine Hells' deepest layer, is a desolate, red ellipse in a void. Fiery winds sweep its chasm-scarred plains. The Styx trickles into the Forgotten Lake, and Lethe flows across it. Malsheem, the Outer Planes' largest city, sits in a trench, housing Asmodeus's fortress. The Serpent's Coil, a deep rift, holds Asmodeus's true form, where devils spawn from his wounds. Asmodeus governs, aided by archdevils and pit fiend generals. Nessus is home to legions of powerful devils: pit fiends, cornugons, amnizus. Tabjari holds copies of the Pact Primeval. Warding runes emphasize its peril and extreme punishment. Nessus, in Forgotten Realms media, embodies ultimate hellish power.