Brago, King Eternal, Wormfang Manta, and Hushbringer

Prerequisites

• Brago, King Eternal on the battlefield
• Wormfang Manta on the battlefield
• Hushbringer on the battlefield
• Brago is untapped and does not have summoning sickness
• An opponent is unable to block Brago

Steps

1. Attack with Brago, dealing combat damage
2. Brago triggers, exiling and returning Wormfang Manta to the battlefield
3. Wormfang Manta triggers, gaining an additional turn after this one
4. Repeat

Results

• Infinite turns