Rushed Rebirth is a rare Instant card from Strixhaven: School of Mages Promos (PSTX), collector number 228p. Current market price: $0.56 (foil $0.97), TCGplayer market prices via Scryfall.
Choose target creature. When that creature dies this turn, search your library for a creature card with lesser mana value, put it onto the battlefield tapped, then shuffle.