The Enigma Jewel // Locus of Enlightenment, Deserted Temple, and Lotus Field

Prerequisites

• The Enigma Jewel // Locus of Enlightenment on the battlefield
• Deserted Temple on the battlefield
• Lotus Field on the battlefield

Steps

1. Activate Lotus Field by tapping it, adding three mana of any color
2. Activate Deserted Temple's second ability by paying and tapping it, targeting itself
3. Locus of Enlightenment triggers, copying Deserted Temple's ability, targeting Lotus Field
4. Resolve both Deserted Temple abilities, untapping it and Lotus Field
5. Repeat

Results

• Infinite colored mana
• Infinite untap of lands you control