human
Write a detailed description of a chilling scene inside a building keep with a ceiling, sconces, trapdoor, and an iron ladder.
assistant
Thick layers of dust lay undisturbed on the worn stone floor. Empty iron sconces, evenly spaced around the room, still hang securely from the strong walls. Rising up through a small opening in the floor, an iron ladder has been bolted to the southern wall and leads to a trapdoor in the ceiling.