Blessed Defiance is a common Instant card from Innistrad: Midnight Hunt (MID), collector number 5. Current market price: $0.23 (foil $0.23), TCGplayer market prices via Scryfall.
Target creature you control gets +2/+0 and gains lifelink until end of turn. When that creature dies this turn, create a 1/1 white Spirit creature token with flying.