human
Make a concise location description of a spooky setting inside a tunnel catacomb with lichen.
assistant
The floor slopes sharply and the air carries a whiff of corruption that is stronger to the west. The faint crunch of pebbles disturbed by your passage sounds as loud as a shout in the silent tunnels. Sparse patches of lichen give off feeble light that barely delineates the position of the beams lining the walls.