Ship Graveyard (Patreon)

Something really dangerous is going on near a small uncharted island a few days northwest. There seems to be a giant monster that comes from the depths of the ocean only to tear ships to splinters and leave. It doesn't even attack the sailors, eat or steal anything. It only destroys the ships.

Some say it's a giant turtle, some say it's a sea dragon. Only a few people have managed to sail back to port with the craziest of stories. What could it be?