Fiendish Codex II: Tyrants of the Nine Hells (3.5e)
Through subtle plotting and brutal aggression¸ the forces of the Nine Hells seek to corrupt or dominate all who stand against them. These fiends¸ as ancient and terrible as any in the multiverse¸ forge armies out of the souls of the wicked and use them to enforce their iron rule. Can your adventurers stand against the might and tyranny of the Nine Hells?