Wall of Stolen Identity is a rare Creature — Shapeshifter Wall card from Commander 2019 (C19), collector number 13. Current market price: $4.32, TCGplayer market prices via Scryfall.
You may have this creature enter as a copy of any creature on the battlefield, except it's a Wall in addition to its other types and has defender. When you do, tap the copied creature and it doesn't untap during its controller's untap step for as long as you control this creature.