Deep Cave is a buffer floor between the Underground and the Underworld. There is little to be found on this inhospitable level; floor and road tiles cannot be placed, the stone pillars on this floor are indestructible, and built objects such as walls vanish extremely rapidly. You may occasionally find an altar or fountain on this level, or even a dog; and there are some monsters around like giant bats and skeletons (or worse, if they are randomly summoned from an altar).

Stairs cannot be built past this floor, you must dig (or find) a hole to fall down to reach the Underworld.

Deep cave