I had made a topic about this in this middle of 2010 but i hope more people will give me their ideas.
I thought it would be cool if your character would change according to their school. For fire i was thinking their eyes or hair turns to fire. For death their heads turns into a skull. Life..... havent gotten that far. Storm a rain cloud follows them wherever they go or sparks fly around them. For myth they get one eye. ice begins to get a cold. Balance your eyes become covered like judgement. In a way i copied abracadoodle because i love it but see if you can doo any better