Blossoming Tortoise, Deserted Temple, Rings of Brighthearth, and Lotus Field

Prerequisites

• Blossoming Tortoise on the battlefield
• Deserted Temple on the battlefield
• Rings of Brighthearth on the battlefield
• Lotus Field on the battlefield

Steps

1. Activate Lotus Field by tapping it, adding three mana of any color Activate Deserted Temple's second ability by tapping it, targeting Lotus Field
2. Rings of Brighthearth triggers, causing you to pay to copy Deserted Temple's ability, targeting Deserted Temple
3. Resolve both Deserted Temple abilities, untapping Deserted Temple and Lotus Field Repeat

Results

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