Critical Hit is a uncommon Instant card from Adventures in the Forgotten Realms (AFR), collector number 137. Current market price: $0.23 (foil $0.37), TCGplayer market prices via Scryfall.
Target creature gains double strike until end of turn. When you roll a natural 20, return this card from your graveyard to your hand. (A natural 20 is a roll that displays 20 on the die.)