The Core of Dungeon

A floating, geometric polyhedron of pulsating obsidian and vein-like veins of gold. It emits a low, rhythmic thrumming sound like a mechanical heartbeat. Its faces constantly rotate and realign, revealing glowing glyphs that depict architectural blueprints and complex runes of binding. When held, the user can feel the immense pressure of a thousand miles of stone weighing upon their consciousness.