Angelic Benediction is a uncommon Enchantment card from Magic 2013 (M13), collector number 4. Current market price: $0.16 (foil $0.49), 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.