Name: The Core CMC: 3 Color: CID: Type: Legendary Land Rules Text: (Transforms from Matzalantli.) Fathomless descent -- {T}: Add X mana of any one color, where X is the number of permanent cards in your graveyard. [Back face. Transforms from Matzalantli, the Great Door.] Set/Rarity: The Lost Caverns of Ixalan rare Set Code: LCI-R Legality: Legal in legacy, Legal in standardbrawl, Legal in vintage, Legal in oathbreaker, Legal in modern, Legal in future, Legal in timeless, Legal in historic, Legal in standard, Legal in duel, Legal in gladiator, Legal in pioneer, Legal in commander, Legal in brawl, Legal in penny Price: $2.83 Foil price: $2.94