Teferi's Tutelage is a uncommon Enchantment card from Core Set 2021 (M21), collector number 78. Current market price: $0.34 (foil $0.38), TCGplayer market prices via Scryfall.
When this enchantment enters, draw a card, then discard a card. Whenever you draw a card, target opponent mills two cards. (They put the top two cards of their library into their graveyard.)