Yeah, I have seen this when Bagan was first published on the Godzilla websites way back in the day. In fact, there was a professional writer called C.L. Weiner that made a 200 some odd page fan fiction of Bagan and this ability of energy wings. Bagan was a Dragon whose heart and body were separated back in the day of the gods. His body was hide in the Himalayas and frozen....protected by a Yeti tribe that you can find in the Hanna Barbara Godzilla cartoon. So basically he is awoken when an evil Necromancer brings him 1 piece of his heart to him. A blue sapphire that embodies water and life. (there are 4 other stones.... Earth for armor, Fire for energy attacks, Air for flight, and Darkness for the ultimate power). Pretty damn good story if you ever want to see a Godzilla fanfiction that has monsters like Biollante, Yongary, King Seesar, and many many others fighting against the demon dragon.