Oko, The Trickster

+1: Put two +1/+1 counters on up to one target creature you control.
0: Until end of turn, Oko, The Trickster becomes a copy of target creature you control. Prevent all damage that would be dealt to him this turn.
-7: Until end of turn, each creature you control has base power and toughness 10/10 and gains trample.