Dreamstone Hedron, Voltaic Construct, and Workshop Elders

Prerequisites

• Dreamstone Hedron on the battlefield
• Voltaic Construct on the battlefield
• Workshop Elders on the battlefield
• Dreamstone Hedron does not have summoning sickness

Steps

1. At the beginning of your combat phase, Workshop Elders triggers, causing Dreamstone Hedron to become an artifact creature
2. Activate Dreamstone Hedron's first ability by tapping it, adding
3. Activate Voltaic Construct by paying , untapping Dreamstone Hedron
4. Repeat from step 2

Results

• Infinite colorless mana