The Enigma Jewel // Locus of Enlightenment, Deserted Temple, and Gruul Turf

Prerequisites

• The Enigma Jewel // Locus of Enlightenment on the battlefield
• Deserted Temple on the battlefield
• Gruul Turf on the battlefield

Steps

1. Activate Gruul Turf by tapping it, adding
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 Gruul Turf
4. Resolve both Deserted Temple abilities, untapping it and Gruul Turf
5. Repeat

Results

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