Rings of Brighthearth, Deserted Temple, and Cabal Coffers

Prerequisites

• Rings of Brighthearth on the battlefield
• Deserted Temple on the battlefield
• Cabal Coffers on the battlefield
• available

Steps

1. Activate Cabal Coffers by paying and tapping it, adding at least six
2. Activate Deserted Temple's second ability by paying and tapping it, targeting Cabal Coffers
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 Cabal Coffers Repeat

Results

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