The Enigma Jewel // Locus of Enlightenment, Voltaic Key, and Astral Cornucopia

Prerequisites

• The Enigma Jewel // Locus of Enlightenment on the battlefield
• Voltaic Key on the battlefield
• Astral Cornucopia on the battlefield
• undefined

Steps

1. Activate Astral Cornucopia by tapping it, adding at least two mana of any color
2. Activate Voltaic Key by paying and tapping it, targeting Astral Cornucopia
3. Locus of Enlightenment triggers, copying Voltaic Key's ability, targeting Voltaic Key
4. Resolve both Voltaic Key abilities, untapping it and Astral Cornucopia
5. Repeat

Results

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