Angelic Benediction is a uncommon Enchantment card from Shards of Alara (ALA), collector number 3. Current market price: $0.17 (foil $1.03), 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.