Temporal Mastery is a mythic Sorcery card from Modern Masters 2017 (MM3), collector number 54. Current market price: $4.82 (foil $5.71), TCGplayer market prices via Scryfall.
Take an extra turn after this one. Exile Temporal Mastery. Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)