Voltaic Construct, Coveted Jewel, and Tezzeret, Betrayer of Flesh

Prerequisites

• Voltaic Construct on the battlefield
• Coveted Jewel on the battlefield
• Tezzeret, Betrayer of Flesh on the battlefield
• Tezzeret has at least two loyalty counters on it
• Coveted Jewel does not have summoning sickness

Steps

1. Activate Tezzeret's second ability by removing two loyalty counters from it, causing Coveted Jewel to become an artifact creature
2. Activate Coveted Jewel by tapping it, adding three mana of any one color
3. Activate Voltaic Construct by paying , untapping Coveted Jewel
4. Repeat from step 2

Results

• Infinite colored mana