Characters obtain a magical flute that causes a tower to sail on a rocky island from the ocean. There is a lot of filthy lucre inside, but much of it is bulky, brittle, puzzling, or dangerous. When the tower starts sailing off, the player characters will need to devise a plan to get the treasure out before the tower leaves for good.
Run it (no prep required) or plunder for inspiration and unique magical treasure.
Check it out here: https://catorbat.itch.io/the-flute-of-sailroc-edifice