Exalted Flamer of Tzeentch, Sundial of the Infinite, and Warrior's Oath

Prerequisites

• Exalted Flamer of Tzeentch on the battlefield
• Sundial of the Infinite on the battlefield
• Warrior's Oath in hand
• You have no instants and/or sorceries in your graveyard
• the first turn, with available each extra turn available

Steps

1. Cast Warrior's Oath by paying
2. Exalted Flamer of Tzeentch's second ability triggers, dealing 1 damage to each opponent
3. Resolve Warrior's Oath, causing you to take an extra turn after this one
4. Move to your extra turn
5. At the beginning of your upkeep, Exalted Flamer of Tzeentch's first ability triggers, returning Warrior's Oath from your graveyard to your hand
6. Repeat steps 1-3 one additional time
7. At the beginning of your end step, Warrior's Oath triggers
8. Holding priority, activate Sundial of the Infinite by paying and tapping it, ending the turn and exiling the Warrior's Oath trigger from the stack
9. Repeat from step 4

Results

• Infinite turns