Edgar, King of Figaro, Ral Zarek, and Oath of Teferi

Prerequisites

• Edgar, King of Figaro on the battlefield
• Ral Zarek on the battlefield
• Oath of Teferi on the battlefield

Steps

1. Activate Ral Zarek's first loyalty ability by putting a loyalty counter on it, tapping a permanent and untapping a permanent
2. 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
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. Repeat step 5 one additional time
6. Repeat from step 3 during your second and third extra turns
7. Repeat from step 1 during your fifth extra turns

Results

• Infinite turns