Zendikar

"Deadly Perils. Priceless Treasures": Zendikar is a plane of adventure, with many treasures, and potent mana supplies, but mana on this plane works differently than in the rest of the multiverse. The plane is littered with large, floating polyhedron-shaped stones called hedrons. Little is known of these Hedrons as not even the people native to the plane know about their purpose. The floating stones however are also an indicator of the fact that gravity is different on Zendikar than on other planes.