Angelic Guardian is a rare Creature — Angel card from Core Set 2020 (M20), collector number 302. Current market price: $4.84, TCGplayer market prices via Scryfall.
Flying (This creature can't be blocked except by creatures with flying or reach.) Whenever one or more creatures you control attack, they gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)