With three crystals restored, only the Air Crystal remains. To reach it, you'll need the Airship. Obtaining the Airship is a multi-step process involving the Floating Castle. First, you'll need to find the Levistone in the Cardia Islands. Once you have the Levistone, you can use it to raise the Floating Castle from the desert. The Floating Castle is your final elemental dungeon, located high in the sky. Be prepared for flying enemies and a unique environment.
