Matzalantli, the Great Door // The Core

Legendary Artifact // Legendary Land

The Lost Caverns of Ixalan (LCI) · rare

Oracle Text

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