Edgar, King of Figaro, Ral Zarek, and Atraxa, Praetors' Voice

Prerequisites

• Edgar, King of Figaro on the battlefield
• Ral Zarek on the battlefield
• Atraxa, Praetors' Voice on the battlefield
• each turn available

Steps

1. Activate Ral Zarek's third loyalty ability by removing seven loyalty counters from it, causing you to flip five coins, which will all be heads due to Edgar, and causing you to take five extra turns after this one
2. At the beginning of your end step, Atraxa triggers, putting a loyalty counter on Ral Zarek
3. Move to your first extra turn
4. Activate Ral Zarek's first loyalty ability by putting a loyalty counter on it, tapping a permanent and untapping a permanent
5. At the beginning of your end step, Atraxa triggers, putting a loyalty counter on Ral Zarek
6. Repeat from step 4 during your second and third extra turns, and repeat step 5 during your fourth extra turn
7. Repeat from step 1 during your fifth extra turns

Results

• Infinite turns
• Lock