The Realm of Earth, also called the Plane of Earth, was one of the Elemental Realms of the Cosmic Wheel. It was an expanse of solid matter pockmarked by bubbles of other elements, and was riddled with fissures and tunnels created by burrowing creatures or the occasional small mining operation. Air could be found in scattered pockets but unbreathable gasses were also present, and no light existed in the Plane of Earth except for rare luminous gems buried in the crushing darkness.
Every type of rock, soil, mineral, metal ore, sand, and dirt could be found here in abundance, but were difficult to obtain due the movement of the substance of the plane and cave-ins caused by intense gravitational shifts.