Vivien, Nature's Avenger is a mythic Legendary Planeswalker — Vivien card from Core Set 2020 (M20), collector number 298. Current market price: — (foil $3.07), TCGplayer market prices via Scryfall.
+1: Put three +1/+1 counters on up to one target creature. −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. −6: Target creature gets +10/+10 and gains trample until end of turn.