Emrakul, the Exigent Doom is a mythic Legendary Creature — Eldrazi card from Reality Fracture (FRA), collector number 1. Current market price: $16.54 (foil $22.65), TCGplayer market prices via Scryfall.
When you cast this spell, untap all lands you control. Flying, trample Ward—Sacrifice three permanents. {3}, Exile this card from your hand: Target land gains "{T}: Add {C}{C}" until this card is cast from exile. You may cast this card for as long as it remains exiled.