The Elemental Planes.
Also known as the “Inner Planes,” the Elemental Planes surround the Material Plane and its mirrors. They provide the raw elemental substance from which all worlds are made of.
The closer to the Material Plane, the features of the Elemental Planes resembles that of the Material Plane. Very much like the Feywild and the Shadowfell, the Elements twist and shape the land.
The four Elemental Planes are the Planes of Earth, Fire, Air and Water. The beings of Earth and Fire have made their mark on Aeslin and Keavras.