A cruel wizard must be defeated in the the deep depths of the sea. Travel though an abandoned underwater city made of randomly generated rooms and floors you have to travel down. Each floor contains dangerous aquatic creatures that you and your trusty knife must get through by slashing enemies and grappling around to avoid their attacks. At the bottom of each biome a fearsome creature will block your way that you must defeat. Should you fail, you'll possess a new vessel to try and try