Matzalantli, the Great Door // The Core (Extended Art) [The Lost Caverns of Ixalan] LIST Whenever another player casts a

Whenever another player casts a spell from anywhere other than their hand

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−1: Target artifact becomes an artifact creature with base power and toughness 5/5

you may pay {G}

Matzalantli, the Great Door // The Core (Extended Art) [The Lost Caverns of Ixalan] LIST Whenever another player casts aSet: The Lost Caverns of Ixalan Type: Legendary Artifact Legendary Land Rarity: Rare T: Draw a card, then discard a card. 4, T: Transform Matzalantli, the Great Door. 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.) Reverse Type: Legendary Land (Transforms from Matzalantli.) Fathomless descent T: Add X mana of any one color,