Rings of Brighthearth, Deserted Temple, and Scorched Ruins

Prerequisites

• Rings of Brighthearth on the battlefield
• Deserted Temple on the battlefield
• Scorched Ruins on the battlefield

Steps

1. Activate Scorched Ruins by tapping it, adding
2. Activate Deserted Temple's second ability by paying and tapping it, targeting Scorched Ruins
3. Rings of Brighthearth triggers, causing you to pay to copy Deserted Temple's ability, targeting Deserted Temple
4. Resolve both Deserted Temple abilities, untapping Deserted Temple and Scorched Ruins
5. Repeat an arbitrarily large number of times
6. Once you have a large amount of , you may untap any other lands you control in place of Scorched Ruins

Results

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