Sublime Archangel is a mythic Creature — Angel card from Secret Lair Drop (SLD), collector number 1381. Current market price: $4.77 (foil $5.27), TCGplayer market prices via Scryfall.
Flying Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) Other creatures you control have exalted. (If a creature has multiple instances of exalted, each triggers separately.)