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 Legality: Legal in brawl, Legal in future, Legal in timeless, Legal in historic, Legal in duel, Legal in vintage, Legal in modern, Legal in penny, Legal in legacy, Legal in gladiator, Legal in standard, Legal in pioneer, Legal in standardbrawl, Legal in commander, Legal in oathbreaker Price: $1.93 Foil price: $1.87