Finale of Promise is a mythic Sorcery card from War of the Spark Promos (PWAR), collector number 127s. Current market price: — (foil $10.10), TCGplayer market prices via Scryfall.
You may cast up to one target instant card and/or up to one target sorcery card from your graveyard each with mana value X or less without paying their mana costs. If a spell cast this way would be put into your graveyard, exile it instead. If X is 10 or more, copy each of those spells twice. You may choose new targets for the copies.