Field of the Dead is a rare Land card from Secret Lair Countdown (SLC), collector number 6. Current market price: $25.53 (foil $28.29), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {C}. Whenever this land or another land you control enters, if you control seven or more lands with different names, create a 2/2 black Zombie creature token.