While I think it looks a tad old, this was still great. I don't tell recall a cartoon that this guy appeared in. Then again, you don't have to make cartoons of everything you draw. Of course, it would be nice. Celestial is just an awesome word. Yes, it reminds me of the pony.
The background is truly impressive. I can't quite make it out, but I think it's supposed to be a warship or something. There are some words that are hard to make out. The blue flames are done nicely too. I just like the expression on his face.