Sure theres a good reason, uh huh... just cause you had to come up with one after you said to yourself, hey, wings on their heads would look cool!! wait.. why should they have wings on their heads, now I have to explain this..
that sword has the look of a sword I came up with sort of think of an energy sword like a lightsaber when the magic is on. only in the mid evil times. I call it legodiel. it can match that of any blade including engery arching ones like a lightsaber. with the way this blade is looking with the lightning coating its blade like that it reminds me of legodiel's effect when its energized ;D