I did this Dragon animation for Colossal Battle website header. I use Spine for the dragon and After effects for post production and fx.

Check their game at:
Facebook Page: https://www.facebook.com/ColossalBattle/
Colossal Battle Teaser Trailer: https://www.youtube.com/watch?v=VNctaj683H0

And check my links for more animation:
https://www.instagram.com/julianocastro