The Echoing Oracles of Vor'nith

The chamber is a perfect circle of polished obsidian, smelling of cold metal and ancient ozone. In the center, four silver busts of regal figures stand on stone plinths around a hovering crystal lens. Moonlight beams from a skylight, hitting the lens and splitting into four dim rays that stop short of the silver mirrors mounted on the walls. The air hums with a low, harmonic frequency that vibrates in your chest whenever you step near the statues.