Wall of Deceit is a uncommon Creature — Wall card from Legions (LGN), collector number 55. Current market price: $0.19 (foil $0.75), TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) {3}: Turn this creature face down. Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)