The Elemental Plane of Water was an Inner Plane or Elemental Plane of the Great Wheel cosmology and the World Tree cosmology models. After the Spellplague, the Elemental Plane of Water collapsed into the Elemental Chaos, mixing with all the other Inner Planes. Water is one of the four elements and two energies that make up the known universe and therefore of great interest to cosmologists. This plane was abundant with life: native creatures born of the elemental nature of the plane itself, sentient water-breathing peoples, and most every species of aquatic life that could survive after being sucked through a vortex from their plane of origin.