Mysterious Limousine, Aurelia, the Warleader, Combat Celebrant, and Dragonlord Kolaghan

Prerequisites

• Mysterious Limousine on the battlefield
• Aurelia, the Warleader on the battlefield or in exile
• Combat Celebrant on the battlefield or in exile
• Dragonlord Kolaghan on the battlefield
• An opponent cannot block and kill Aurelia
• Mysterious Limousine does not have summoning sickness and cannot be blocked and killed by an opponent
• One of Aurelia or Combat Celebrant must be on the battlefield, with the other exiled by Mysterious Limousine

Steps

1. Declare either Aurelia or Combat Celebrant and Mysterious Limousine as attackers
2. Mysterious Limousine and either Aurelia or Combat Celebrant trigger
3. Resolve the Aurelia or Combat Celebrant trigger, untapping Mysterious Limousine and causing you to get an additional combat phase after this one
4. Resolve the Mysterious Limousine trigger, exiling Aurelia or Combat Celebrant from the battlefield, and then returning Aurelia or Combat Celebrant from exile to the battlefield
5. Repeat each combat phase

Results

• Infinite LTB
• Infinite ETB
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce