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 brawl, Legal in penny, Legal in competitivebrawl, Legal in standardbrawl, Legal in oathbreaker, Legal in commander, Legal in duel, Legal in vintage, Legal in future, Legal in legacy, Legal in modern, Legal in standard, Legal in timeless, Legal in historic, Legal in pioneer, Legal in gladiator Price: $2.58 Foil price: $3.64