Creatures with flying as an activated ability aren't in red's color pie.
Primary in Blue, Secondary in White, Red and Black. So, it's actually fine. Anyway, points of interest:
- Both 'defending player' and 'target opponent' work, but they function differently. In a multiplayer game, 'target opponent' will allow you to choose any opponent. 'Defending player' in that situation will only be able to burn the player you are attacking.
- As a common, it's too complex. It's almost certainly uncommon. Commons should generally be fairly simple. Therefore remove intimidate, or remove the activated flying. Doesn't need two evasion abilities. You'd just about get away with it as a Common then.