Mr. Unicorn

{W}: Creatures you control get either +1/+1, +2/+0, or +0/+2 until end of turn. {2}{B}: Return target Wizard in a graveyard to its owner’s hand. {3}{R}: Until end of turn, double all combat damage a Human you control would deal. {4}{G}: Creatures you control get +3+3 and also gain trample until end of turn.