This act begins when you arrive in Curst and ends when you leave Curst Prison for the Outlands after finding and freeing the Deva, whose name is Trias. Sounds like it could be a bit tricky to find a Deva in this place. If you ask one of the Curst Guards, you can learn that the city is currently under quarantine, which means nobody gets in or out – except you, obviously – and that the gate to Carceri is closed at the moment. In fact, there is only one on the surface and one in the Underground. Unlike Sigil, Curst doesn't have a lot of side quests. You won't find him on the surface but in Curst's underground prison however the problem is getting down there. Ravel told you to seek out a Deva in Curst and your next job is to find him. As Fall-From-Grace will tell you, Curst is a town of betrayers, and everybody here has their own agenda. Carceri is one of the Hells the plane that borders on the Abyss itself, and Curst is but one step away from Carceri. You leave Ravel's Maze to find yourself at the entrance to the city of Curst, gate town to the prison plane Carceri.