Human: Generate for me a description of a chilling scene inside a basement with water and murals. Assistant: 
Somber murals surround this chamber where the stone paved floor has sunk several feet below the doorway leading back out into the vaulted room. All but for a few paces of floor remain, the rest has quietly succumbed to a rising pool of black water that dominates most of the room. Occasionally, something causes the water to ripple as unseen things stir beneath the surface.