Kiki-Jiki, Mirror Breaker, Cacophodon, and Warstorm Surge

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Cacophodon on the battlefield
• Warstorm Surge 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 Warstorm Surge, dealing damage to the Cacophodon token equal to its power
3. The Cacophodon token triggers, untapping Kiki-Jiki
4. Repeat

Results

• Infinite creature tokens with haste
• Infinite ETB