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

Prerequisites

• You have at least four permanent cards in your graveyard.

Steps

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

Effects

• Infinite colored mana
• Infinite mana lands you control can produce
• Infinite untap of lands you control