Finale of Revelation is a mythic Sorcery card from Murders at Karlov Manor Commander (MKC), collector number 106. Current market price: $0.55, TCGplayer market prices via Scryfall.
Draw X cards. If X is 10 or more, instead shuffle your graveyard into your library, draw X cards, untap up to five lands, and you have no maximum hand size for the rest of the game. Exile Finale of Revelation.