The Enigma Jewel // Locus of Enlightenment, Voltaic Key, and Mana Vault

Prerequisites

• The Enigma Jewel // Locus of Enlightenment on the battlefield
• Voltaic Key on the battlefield
• Mana Vault on the battlefield

Steps

1. Activate Mana Vault by tapping it, adding Activate Voltaic Key by paying and tapping it, targeting Mana Vault
2. Locus of Enlightenment triggers, copying Voltaic Key's ability, targeting Voltaic Key
3. Resolve both Voltaic Key abilities, untapping it and Mana Vault
4. Repeat

Results

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