Vivien's Invocation is a rare Sorcery card from Core Set 2019 (M19), collector number 209. Current market price: $0.27 (foil $0.27), TCGplayer market prices via Scryfall.
Look at the top seven cards of your library. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order. When a creature is put onto the battlefield this way, it deals damage equal to its power to target creature an opponent controls.