Angelic Benediction is a uncommon Enchantment card from Duel Decks: Divine vs. Demonic (DDC), collector number 19. Current market price: $0.26, TCGplayer market prices via Scryfall.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) Whenever a creature you control attacks alone, you may tap target creature.