Voltaic Construct, March of the Machines, and Dreamstone Hedron

Prerequisites

• Voltaic Construct on the battlefield
• March of the Machines on the battlefield
• Dreamstone Hedron on the battlefield

Steps

1. Activate Dreamstone Hedron by tapping it, adding
2. Activate Voltaic Construct by paying , untapping Dreamstone Hedron
3. Repeat

Results

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