Lost Legacy is a rare Sorcery card from Kaladesh Promos (PKLD), collector number 88s. Current market price: — (foil $0.62), TCGplayer market prices via Scryfall.
Choose a nonartifact, nonland card name. Search target player's graveyard, hand, and library for any number of cards with that name and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.