Matzalantli, the Great Door // The Core

Matzalantli, the Great DoorLegendary Artifact

{T}: Draw a card, then discard a card. {4}, {T}: Transform Matzalantli. Activate only if there are four or more permanent types among cards in your graveyard. (Artifact, battle, creature, enchantment, land, and planeswalker are permanent types.)

The CoreLegendary Land

(Transforms from Matzalantli.) Fathomless descent — {T}: Add X mana of any one color, where X is the number of permanent cards in your graveyard.