Kiki-Jiki, Mirror Breaker + Cacophodon + Pandemonium

Kiki-Jiki, Mirror Breaker

Cacophodon

Pandemonium

How it works

1. Activate Kiki-Jiki by tapping it, creating a token copy of Cacophodon with haste.
2. The Cacophodon token enters the battlefield, triggering Pandemonium, dealing damage to the Cacophodon token equal to its power.
3. The Cacophodon token triggers, untapping Kiki-Jiki.
4. Repeat.

This loop transforms Kiki-Jiki, Mirror Breaker's legendary limitation into a perpetual engine by relying on the nonlegendary Cacophodon to bounce energy right back into the table. Each time the token copy enters the battlefield, Pandemonium triggers and deals damage directly to the Cacophodon token, which instantly sparks its Enrage ability to untap Kiki-Jiki, Mirror Breaker for another go. Because Pandemonium deals damage equal to the token's power, it fulfills the Enrage condition without needing outside intervention, feeding your engine an endless parade of hasty copies and damage triggers.