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 standardbrawl, Legal in historic, Legal in timeless, Legal in vintage, Legal in standard, Legal in oathbreaker, Legal in pioneer, Legal in gladiator, Legal in legacy, Legal in future, Legal in brawl, Legal in modern, Legal in commander, Legal in penny, Legal in duel Price: $3.05 Foil price: $4.03