What are the abilities of Vivien, Nature's Avenger?
user
[+1]: Put three +1/+1 counters on up to one target creature.\n[−1]: Reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.\n[−6]: Target creature gets +10/+10 and gains trample until end of turn.
assistant