Labyrinth Guardian is a uncommon Creature — Illusion Warrior card from Amonkhet (AKH), collector number 60. Current market price: $0.08 (foil $0.40), TCGplayer market prices via Scryfall.
When this creature becomes the target of a spell, sacrifice it. Embalm {3}{U} ({3}{U}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Illusion Warrior with no mana cost. Embalm only as a sorcery.)