Voltaic Construct, Coveted Jewel, and Bello, Bard of the Brambles

Prerequisites

• Voltaic Construct on the battlefield
• Coveted Jewel on the battlefield
• Bello, Bard of the Brambles on the battlefield

Steps

1. Activate Coveted Jewel by tapping it, adding three mana of any one color
2. Activate Voltaic Construct by paying , untapping Coveted Jewel
3. Repeat

Results

• Infinite colored mana