Human: Generate for a mystical setting inside a keep with a crystal-domed observatory tower. Assistant: 
The tiles of the roof are formed of a polished, inky black stone that resonates with magical energy. The fortress spreads out below like a coin stamped with a triskele seal, although the view is partially obstructed by the crystal-domed observatory tower. The open area known as the Chamber of All, in the center of the citadel, resembles a glaring eye.