Oko, the Trickster (309) [Throne of Eldraine]

+1: Put two +1/+1 counters on up to one target creature you control. 0: Until end of turn, Oko 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.