Dreamstone Hedron, Voltaic Construct, and Ensoul Artifact

Prerequisites

• Dreamstone Hedron on the battlefield
• Voltaic Construct on the battlefield
• Ensoul Artifact on the battlefield
• Dreamstone Hedron does not have summoning sickness

Steps

1. Activate Dreamstone Hedron's first ability by tapping it, adding
2. Activate Voltaic Construct by paying , untapping Dreamstone Hedron
3. Repeat

Results

• Infinite colorless mana