The Oceans of the Nexus
The conjunction of the four elemental planes in one place for one moment of time created the Nexus. From one corner of each of the four infinite realms, an infinite corner realm in and of itself came to be. And endless sea, atop and endless land, beneath an endless sky, churning with the heat of an endless summer. Isles of any size part the surface of the sea where Earth is strong. Whirlpools and other Rifts gouge out ribbons of water where Air is strongest. When Water is dominant, mountainous Swells rise, no longer bound to the earth below by gravity. Where fire is strongest, volcanoes rise, and Flares change everything they touch, scorching even the surface of the water. The Nexus, being already the unstable union of four realms, sometimes enters the other Planes, creating temporary links to other places and other times.