Rhelle, Against the Grain

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Extort (Whenever you cast a spell, you may pay {w/b}. If you do, each opponent loses 1 life and you gain life equal to the total life lost this way.)
Costs requiring {w/b} can be paid with mana of any color.