Kiki-Jiki, Mirror Breaker + Phantom Steed + Phantom Train

Kiki-Jiki, Mirror Breaker

Phantom Steed

Phantom Train

How it works

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

This crafty loop lets you infinitely recur Kiki-Jiki, Mirror Breaker and its token creations by using Phantom Steed to stash the goblin safely out of harm's way. When you tap Kiki-Jiki to copy the Steed, the resulting token's enter-the-battlefield trigger exiles Kiki-Jiki, setting up the rescue mission. Feeding that token to Phantom Train satisfies the sacrifice requirement, which immediately releases Kiki-Jiki back to the battlefield so the entire process can begin anew.