Aech: There is a trap, but it has previously gone off and not been reset. As you open the door you see a softly lit hallway. Books, scrolls, and tablets are stuffed into shelves on the walls. The hallway shortly becomes an intersection, the 3 branching directions each descending at a 45 degree angle. In the center of the hallway sits a large pile of bones, with a cage made of bones suspended 10 feet above it. Inside the cage is a small humanoid figure dressed all in black like the men you ran into on the roof, he lies motionless in the cage.