human
Generate for me a description of a chilling scene inside a tunnel tower with empty torch sconces and a corridor.
assistant
Empty torch sconces cling forlornly to the soot-streaked riverstone slabs of the tunnel walls, the light and warmth that once bedecked this dreary hall long since extinguished. Cast by the merest glimmer of illumination from elsewhere in the corridor, long shadows flick and shudder across the drab stonework like the silent flight of bats at twilight.