Voltaic Construct, Overgrown Battlement, and Liquimetal Torque

Prerequisites

• Voltaic Construct on the battlefield
• Overgrown Battlement on the battlefield
• Liquimetal Torque on the battlefield

Steps

1. Cause Overgrown Battlement to become an artifact using Liquimetal Torque
2. Activate Overgrown Battlement by tapping it, adding at least
3. Activate Voltaic Construct by paying , untapping Overgrown Battlement
4. Repeat from step 2

Results

• Infinite green mana
• Infinite untap of artifact creatures you control