These are planes of the Inner Sphere, layered around the material plane, each composed of an element of existence.
“The Elemental Plane of Water is a plane of the Inner Sphere composed almost entirely of fresh...Plane of Water
“The Elemental Plane of Fire is the outermost of the elemental planes, encircling the Plane of...Plane of Fire
“The Plane of Air is an elemental plane of the Inner Sphere, which in metaphysical terms is the...Plane of Air
“The term elemental plane or planes is a collective term used to refer to the planes of elemental...Elemental plane