Rings of Brighthearth + Deserted Temple + Matzalantli, the Great Door // The Core

Rings of Brighthearth

Deserted Temple

Matzalantli, the Great Door // The Core

How it works

1. Activate The Core by tapping it, adding at least four mana of any color.
2. Activate Deserted Temple's second ability by paying 1 and tapping it, targeting The Core.
3. Rings of Brighthearth triggers, causing you to pay 2 to copy Deserted Temple's ability, targeting Deserted Temple.
4. Resolve both Deserted Temple abilities, untapping Deserted Temple and The Core
5. Repeat

This clever engine turns your graveyard into a bottomless well of mana by utilizing The Core—the transformed side of Matzalantli, the Great Door—to generate a massive influx of colored mana based on your permanent card count. To keep the cycle going, Deserted Temple taps to untap The Core, while Rings of Brighthearth steps in as the ultimate catalyst by copying the Temple's untap ability for just two mana. Because Rings of Brighthearth triggers off any non-mana activation, you can simultaneously untap Deserted Temple itself, creating a self-sustaining loop that nets infinite mana and infinite untaps of your lands.