The lair of the notorious creature known as the Collector, where its many servants bring back captives intended to join its grisly collection of souls. A sprawling dungeon built along an underground river, its many cells are crowded with captured soldiers, strange horrors and exotic fey, watched over by misshapen derro thralls.

A large dungeon, with two ladder entrances, though my players entered via the 2×2 grate in one of the corners. Should serve as a dungeon of the classical variety, with any unwanted entrances easily removed. There are some pit traps hidden in the floor, which I used hide volumes to reveal, but their use is up to you.