Where the party fights a death knight and then a lich. Finally they confront Demogorgon in his lair, summon an ancient red dragon, and finally defeat the Prince of Demons. The savage simulacrum of Leon Sip Sip becomes the new Prince of Demons: Pis Pis Noel.
The Party Approaches Wat Dagon and attacks the forces gathered outside. The power of a 20th level evoker with a simulacrum becomes evident. They enter Wat Dagon, find a fake Lavinia, and discover the final fate of Vanthus as a demonic larva with his mortal head.