"Zephyr ponies!
So.. I've wanted to continue the idea of the "plant pony" piece I did earlier, thumbnailed below. Thinking about the story for that one spun me into thinking about all kinds of things about the past of Equestria, I wanted to build something of my own on that.
So with Tirek we learned that every type of pony has actual magic within and specific abilities brought by the magic, even earth and pegasi. That lead me to continue the idea of the last ancients piece with another form of magical elemental-ish ponies. So I ended up designing the descendants of pegasi, the manifestation of magic they still have inside with the ability to control weather and elements of the sky.
The hardest thing about this whole idea was to choose whether I want the original Ancients to be either growth or magic, because both have contradicting design choices. But I have some other plans for the representation of magic…
Hopefully some already explained canon thing I haven't heard about wont clash with my ideas instantly. Although my whole idea is still very vague at this point."