Mysterious Limousine + Combat Celebrant + Aurelia, the Warleader + The Fire Crystal

Mysterious Limousine

Combat Celebrant

Aurelia, the Warleader

The Fire Crystal

How it works

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.