human
Make a concise location description of a foreboding scene inside a building tower with brass and copper ornamentation and a crusted brown stain.
assistant
Interleaved brass and copper ornamentation gleams from the edges of an arched niche along the western wall. Nearby, the smooth facade of pale sandstone is marred by a crusted brown stain, as if something has slid down the wall into a heap, but the source of the blotch is nowhere to be seen. A faint iron tang clings to the air.