Is this powers only, or will non-humans turn human/muggles turn into angels/demons/half-robots/what-have-you?
I know this doesn't apply to all magical characters, but in the cases it does I think it could be a fun additional thing to play with? Suddenly Eliot can't cope via alcohol because it's literally impossible for him to suppress anything even temporary no matter how much he drinks.
(Also: thanks for setting this up, guys. It'll be fun.)