Crystal Barricade is a rare Artifact Creature — Wall card from Foundations (FDN), collector number 444. Current market price: $2.76 (foil $2.67), TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) You have hexproof. (You can't be the target of spells or abilities your opponents control.) Prevent all noncombat damage that would be dealt to other creatures you control.