Boat like platforms in a malestrom. players need to gather items using skill checks impeded by sea monsters, puzzles and traps in order to collect items that will allow them to dive under the waves to face a massive creature and its minions

The Whirlpool Reliquary

The floor is a graveyard of boat-like platforms lashed together by chains, rope, and old magic, each one bobbing on the black skin of a maelstrom. Some look like half-swallowed longships, others like rowed barges or shrine-barges with their hulls split open to make rooms, alleys, and cramped hiding places. The air is wet with salt and thunder. Every plank groans, every gap between decks yawns over churned water, and every step feels like a wager against the sea itself. This was once a desperate harbor-reliquary built by hands that feared something beneath the waves. The builders turned their vessels into a moving fortress, hiding keys, charms, and rites in side cabins and sealed holds, all meant to prepare the faithful for a final descent. But the ritual failed, or was interrupted, and now the platforms drift in a perpetual storm while sea monsters and ward-bound minions claim the routes between them. The deeper the party goes, the more the dungeon shifts from scavenged shipwreck to submerged temple, until at last the only way forward is to dive beneath the waves and face what waits in the dark below.