Relique du Madde
Adventurer
Huh, weird.
It makes sense. A setting about pirates which have pirating rules needs giant turtle islands.
Imagine, your pirate crew spots several islands one day. Your captain orders your ship to be brought ashore on the largest one for careening. All seems well.
Next morning you wake up to notice that the other islands have suddenly vanished. Then about noon, the tide suddenly starts rising at a phenomenal rate. Within minutes the island and everything on it is inundated, leaving the surviving crew members at the mercy of the bitter sea and stuck aboard several small skiffs.