Dreamstone Hedron, Voltaic Construct, and Mishra, Eminent One

Prerequisites

• Dreamstone Hedron on the battlefield
• Voltaic Construct on the battlefield
• Mishra, Eminent One on the battlefield

Steps

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Dreamstone Hedron that is a 4/4 Construct with haste named Mishra's Warform
2. Activate Mishra's Warform by tapping it, adding
3. Activate Voltaic Construct by paying , untapping Mishra's Warform
4. Repeat from step 2

Results

• Infinite colorless mana