Mysterious Limousine, Fear of Missing Out, Combat Celebrant, and The Fire Crystal

Prerequisites

• Mysterious Limousine on the battlefield
• Fear of Missing Out on the battlefield or in exile
• Combat Celebrant on the battlefield or in exile
• The Fire Crystal on the battlefield

Steps

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

Results

• Infinite self-discard triggers
• Near-infinite ETB
• Infinite draw triggers
• Near-infinite LTB
• Infinite rummaging
• Near-infinite combat phases
• Near-infinite untap of creatures you control
• Near-infinite mana creatures you control can produce