These monsters are described in Fiendish Codex II: Tyrants of the Nine Hells: Amnizu, Aspect of Asmodeus, Ayperobos Swarm, Aspect of Baalzebul, Aspect of Bel, Aspect of Belial, Black Abishai, Blue Abishai, Brachina, Bueroza, Aspect of Dispater, Dogai, Excruciarch, Falxugon, Aspect of Glasya, Green Abishai, Hellfire Engine, Kalabon, Aspect of Levistus, Malebranche, Aspect of Mammon, Aspect of Mephistopheles, Merregon, Narzugon, Nupperibo, Orthon, Paeliryon, Red Abishai, Spinagon, White Abishai, Xerfilstyx