The drowned foundation of the lighthouse, explored across three levels: a flooded undercroft, deeper caverns with cells, and a clockwork heart at the summit. Pale stone halls keep breaking out into vast underground waters. Tied to the Curse of the Lady's Light.

Dungeon Level 1 opens on a long underground lake feeding into clean tiled halls. A cross-shaped ritual room sits west — one arm scorched, one marked with a glowing pentagram — beside a row of cells and a teleport chamber. Stage a rescue or an interrupted rite here.

Dungeon Level 2 drops into a wide flooded cavern with a winding waterway and a sandy islet reachable only by boat. Dry halls branch off — a pillared gallery, storerooms, a small mosaic room. The level for boat crossings, an ambush from below, or a chase through the channels.

Upper Level is the mechanical crown: a rune-ringed gear-room with a spiral stair, interlocked octagonal cells shaped like cogs, and a round chamber strewn with the remains of those who came before. These rotating, rune-keyed rooms are puzzle and battlefield — the locked heart of the Lady's Light.