Sylvan Library is a mythic Enchantment card from Dominaria Remastered (DMR), collector number 350. Current market price: $27.16 (foil $35.06), TCGplayer market prices via Scryfall.
At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.