Kiki-Jiki, Mirror Breaker, Cacophodon, and Marauding Raptor

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Cacophodon on the battlefield
• Marauding Raptor on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, creating a token copy of Cacophodon with haste
2. The Cacophodon token enters the battlefield, triggering Marauding Raptor, dealing 2 damage to the Cacophodon token and giving Marauding Raptor +2/+0 until end of turn
3. The Cacophodon token triggers, untapping Kiki-Jiki
4. Repeat

Results

• Infinite creature tokens with haste
• Infinite ETB
• Infinitely powerful Marauding Raptor until end of turn