Hey guys, i used to watch this anime show maybe 6-8 years ago. Totally forgot the name but would love to watch it again. From what i remember it was a based around this main character. A young guy who had like angel type wings and all. he slayed a dragon to get its like heart or something to power this sortof dragon gundam type thing. he fought these like bad guys who had these gundam things not dragon like like his that could turn invisible but he like could tell where they were with this crystal thingy or something thats part is a bit sketchy. Oh and he had a brother who was on the enemy side that had failed at killing the dragon and was messed up and his wings were black because of it. Does anybody have any idea what i'm talking about?