Jaheira's Respite is a rare Instant card from Battle for Baldur's Gate Promos (PCLB), collector number 238s. Current market price: — (foil $3.83), TCGplayer market prices via Scryfall.
Search your library for up to X basic land cards, where X is the number of creatures attacking you, put those cards onto the battlefield tapped, then shuffle. Prevent all combat damage that would be dealt this turn.