Gonti's Aether Heart, Mishra, Eminent One, and Panharmonicon

Prerequisites

• Gonti's Aether Heart on the battlefield
• Mishra, Eminent One on the battlefield
• Panharmonicon on the battlefield

Steps

1. At the beginning of combat, Mishra triggers, creating a 4/4 artifact creature token copy of Gonti's Aether Heart named Mishra's Warform
2. Mishra's Warform enters the battlefield, triggering itself and Gonti's Aether Heart twice each, causing you to get eight energy counters
3. Activate Mishra's Warform by paying eight energy counters and exiling it, taking an extra turn after this one
4. Repeat each turn

Results

• Infinite turns