Mysteries of Alterra
The world your characters inhabit is called Alterra. Alterra is a many layered world of magic and mystery. The surface of the world heaves with the machinations of powerful empires and the lives of a diverse populace. Beneath the ground lay the remnants of forgotten civilizations and and terrible, ancient power.
Behind it all, the ancient legends tell of the saviors of all the worlds and of tricksters who herald the end of all time.