Voltaic Construct, March of the Machines, and Prismatic Geoscope

Prerequisites

• Voltaic Construct on the battlefield
• March of the Machines on the battlefield
• Prismatic Geoscope on the battlefield

Steps

1. Activate Prismatic Geoscope by tapping it, adding at least three mana of any color Activate Voltaic Construct by paying , untapping Prismatic Geoscope
2. Repeat

Results

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