Quote Originally Posted by ShoeVsYou View Post
I had assumed that it was due to wind aspected aether. Just as the pools in Voor Sian Siran are generated by water aspected crystals. If you look at the bottom of a lot of the "islands", there are green crystals.
Mostly this. Sea of Clouds is wind aspected and Churning Mists is lightning aspected. Thats also why they have unique umbral weather, overaspected aether.