Voltaic Construct, March of the Machines, and Sceptre of Eternal Glory

Prerequisites

• Voltaic Construct on the battlefield
• March of the Machines on the battlefield
• Sceptre of Eternal Glory on the battlefield

Steps

1. Activate Sceptre of Eternal Glory by tapping it, adding three mana of any color Activate Voltaic Construct by paying , untapping Sceptre of Eternal Glory
2. Repeat

Results

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