human
Generate a detailed description of a spooky cavern with a pool of water, ledge, and a crevice.
assistant
A crevice has opened in the floor of the cavern here. The crevice is not very wide, and is only as long as a quarter staff, but no bottom is visible. A cold draft blows upward out of the crevice. To the northeast, a ledge overlooks a pool of water gathering below.