Like its name sake the Levi Stone is able to make large objects float. For example, ships, castles, and island. This is very rare. Only one has been found. So for now it is considered an artifact. It cannot be replaced.

The Levi Stone was created by the ancients to help them live in the sky away from the rest of the world. They use the Levi Stone to place castles in the sky and to power there airships. They developed the Levi Stone and other useful items a long time ago.