Discerning Taste is a common Sorcery card from Modern Horizons 2 (MH2), collector number 82. Current market price: $0.20 (foil $0.27), TCGplayer market prices via Scryfall.
Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard. You gain life equal to the greatest power among creature cards put into your graveyard this way.