Human: Produce a detailed written description of a foreboding cavern with a cavern, a pile of stone, and tunnels. Assistant: 
Tunnels veer off in three directions. Air currents have quickened, carrying the stink of sulfur and fire. To the south, the passageway widens, and a cavern is just visible around a bend of the walls. Opposite that, a tunnel to the north leads into deep shadow, in which no landmarks are visible other than a churned up pile of stone at its mouth to lend hazard to the darkness.