Kiki-Jiki, Mirror Breaker + Wormfang Drake + Phantom Train

Kiki-Jiki, Mirror Breaker

Wormfang Drake

Phantom Train

How it works

1. Activate Kiki-Jiki by tapping it, creating a token copy of Wormfang Drake.
2. When the Wormfang Drake token enters the battlefield, it triggers, exiling Kiki-Jiki until Wormfang Drake leaves the battlefield.
3. Activate Phantom Train by sacrificing the Wormfang Drake token.
4. When the Wormfang Drake token dies, Kiki-Jiki is returned from exile to the battlefield.
5. Resolve the Phantom Train ability.
6. Repeat.

This clever loop relies on Kiki-Jiki, Mirror Breaker repeatedly cloning Wormfang Drake to exploit its clever exile trigger. When the Wormfang Drake token enters the battlefield, its triggered ability temporarily exiles Kiki-Jiki, Mirror Breaker, but sacrificing that very token to Phantom Train sends it to the graveyard and immediately returns Kiki-Jiki, Mirror Breaker safely to the battlefield. Meanwhile, Phantom Train gets bigger from the sacrifice, and because the token never survived to the end step, you can repeat the process indefinitely for an endless stream of triggers.