Kiki-Jiki, Mirror Breaker + Umbral Collar Zealot + Fiend Hunter

Kiki-Jiki, Mirror Breaker

Umbral Collar Zealot

Fiend Hunter

How it works

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

This clever loop begins by using Kiki-Jiki, Mirror Breaker to churn out a token copy of Fiend Hunter, whose enters-the-battlefield trigger promptly exiles Kiki-Jiki itself to clear the way for its departure. From there, you simply sacrifice that Fiend Hunter token to Umbral Collar Zealot, whose sacrifice ability lets you surveil 1 while sending the Fiend Hunter to the graveyard. Because the token leaves the battlefield, its delayed trigger fires to return Kiki-Jiki safely to the board, ready to tap and start the cycle all over again.