Kai, Warden of the Wilds

+1: Add one mana of any color to your mana pool. Use it only to cast creature spells
-3: Look at the top card of your library. If it's a creature card you may cast it. If you cast it this way, it gains flying.
-9: You get an emblem that says: Creatures you control get +2/+2 and gain Trample. Your opponents can't cast noncreature spells.