Ha! My language comes from Latin [-)! It's stylish, but I don't know if it's the coolest...
I think Aero wants at least the abilities to have a "normal" name, and if you think about it, all abilities are in pure english, am I wrong?(although a latin word would be cool too)
I've personally liked the megma's idea. I think it's good because it says "solar" that can sound(if you have a good imagination
) similar to "soul", which is something obviously related to the ability. And it's very cool
(for a ability related to the sun to be cool...hahahaha... ... ...).
My personal idea is: Sun Soul or Sun Heart, with the variations Light Heart and Dark Heart.