Human: Create for me a description of a spooky scene outside a coastal area beach with sand, stones, and obsidian. Assistant: 
Despite the somber cover of darkness, flecks of white and grey speckle the sandy floor. Small obsidian stones, half-buried in the sand, threaten to trip the careless beachcomber. The stones are lonely remains of the volcanic flow that long ago burned a path here and eventually added its own body to that of the sands.