Voltaic Construct, Gilded Lotus, and Myr Welder

Prerequisites

• Voltaic Construct on the battlefield
• Gilded Lotus in exile
• Myr Welder on the battlefield

Steps

1. Activate Myr Welder using Gilded Lotus's ability by tapping it, adding three mana of any color
2. Activate Voltaic Construct by paying , untapping Myr Welder
3. Repeat

Results

• Infinite colored mana