Ugin's Labyrinth is a mythic Land card from Modern Horizons 3 Promos (PMH3), collector number 233p. Current market price: $12.54 (foil $13.38), TCGplayer market prices via Scryfall.
Imprint — When this land enters, you may exile a colorless card with mana value 7 or greater from your hand. {T}: Add {C}. If a card is exiled with this land, add {C}{C} instead. {T}: Return the exiled card to its owner's hand.