The powerful wizard Sumuho styled himself as a god and was worshipped far and wide. After his fall, his vast temple sank into the desert long ago. What secrets lie in the Sanctuary of Sumuho?
Trapped forever in the grip of the Sea of Jade, paralyzed by the Great Curse, the Fleet of Nazran has become a hellish prison of eternal torment, and the tomb of adventurers from across the Earth.
If you want to add a "supernatural" touch to your campaign, define the rules of magic and the universe. Make your players comfortable with those rules. Then your new supernatural creatures must then break those rules.