Wall of Junk is a uncommon Artifact Creature — Wall card from Dominaria Remastered (DMR), collector number 240. Current market price: $0.31 (foil $0.38), TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) When this creature blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)