Sphere of Air

An endless expanse of air populated only by drifting pieces of other spheres, the most common being that of the spheres of Earth and Mortal but also some from Death and Water. Aerial species thrive here and it is one of the most accessible spheres for those native to the Mortal Sphere.
There are no real scale to the spheres when one strays from the spheres of Life, Death and Mortality. They are endless while at the same time one can find the borders if they know how to look and to travel. The Sphere of Air sits above the Sphere of Water, which appears as the surface of an endless sea with islands dimpling its surface in a barely discernable scattering. Above the Sphere of Air is the void between worlds, the air slowly fading away as one rises towards the airless and hostile nether. 
There is no

The Aetherwyld A vast realm found in the Sphere of Air where the canopy of the Tree of Solitude breaches into the Sphere. The highest branches go even further, soaring into the void beyond the Sphere.