What are the Aetherways? They are the space between planes, or perhaps
that which keeps the planes apart. Aether manses are dimensional bubbles
within the Aetherways, and the masters of these bubbles can shape the
matter within to appear as whatever they want.

Because of this unique nature of the Aetherways, they are always
considered to be adjacent planes to every plane.

This has its benefits and drawbacks as I'm sure the owners of such
marvels will discover.

Penned by my hand on the 7th of Avechary, in the year 108 CE.