Aethershield Artificer is a uncommon Creature — Dwarf Artificer card from Jumpstart 2022 (J22), collector number 140. Current market price: $0.23, TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, target artifact creature you control gets +2/+2 and gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)