Deserted Temple, Rings of Brighthearth, and Gaea's Cradle

Prerequisites

• Deserted Temple on the battlefield
• Rings of Brighthearth on the battlefield
• Gaea's Cradle on the battlefield
• You control at least four creatures

Steps

1. Activate Gaea's Cradle by tapping it, adding at least
2. Activate Deserted Temple's second ability by paying and tapping it, targeting Gaea's Cradle
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 Gaea's Cradle
5. Repeat
6. Once you have infinite mana, you may untap any other lands you control in place of Gaea's Cradle

Results

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