Mephistopheles, Lord of the Eighth
Type: Archdevil of the Nine Hell
Territory: Eight Circle
The Duke of Cania embodies the casually cunning evil of the Nine Hells. From a labyrinthine citadel on the frozen hellscape of the Eighth Circle, Mephistopheles reaches out to the world, fomenting sin, and even siring children in the pursuit of his own unspeakable ends.
Published in Forgotten Realms Campaign Guide, page(s) 81.