Water Blades

An unexplored world lies hidden deep beneath the sea, filled with the wrecks of ancient ships, waiting for the fledgling sailor to blast them into countless pieces. The cave on the seabed is surrounded by stones. You can withstand one impact, but it's not enough to stop death from taking your soul deep into the sea, leaving you with a black death. Any young and inexperienced sailor would shy away from this adventure, for not everyone can handle the perils of the vast ocean, but you'd miss out on the rewards and treasures beneath the sea.