Gonti's Aether Heart, Mishra, Eminent One, and Kurkesh, Onakke Ancient

Prerequisites

• Gonti's Aether Heart on the battlefield
• Mishra, Eminent One on the battlefield
• Kurkesh, Onakke Ancient on the battlefield
• each other turn available

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. When Mishra's Warform enters the battlefield, it and Gonti's Aether Heart trigger, causing you to get
3. Activate Mishra's Warform by paying eight and exiling it
4. Kurkesh triggers, causing you to pay to copy Mishra's Warform's ability
5. Resolve both Mishra's Warform abilities, causing you to take two extra turns after this one
6. Move to your first extra turn, and repeat steps 1 and 2 once
7. Move to your second extra turn, and repeat from step 1

Results

• Infinite turns