Matzalantli, the Great Door // The Core

(T: Add G.)

When this enchantment enters, create a 1/1 black Bat creature token with flying for each mana from a Cave spent to cast it. Whenever a Cave you control enters, put a +1/+1 counter on target creature you control.

This spell costs 3 less to cast if it targets a tapped creature. Exile target creature.

Return target artifact or non-Aura enchantment card from your graveyard to the battlefield with X additional +1/+1 counters on it. It's a 1/1 Spirit creature with flying in addition to its other types.

Target creature gets +1/+3 and gains flying until end of turn. Untap it.

Tap two untapped artifacts and/or creatures you control: Put a +1/+1 counter on this creature. Activate only as a sorcery.

Whenever this creature becomes tapped, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

When this artifact enters, search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. You gain 2 life. Craft with artifact 5WW (5WW, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)