Kiki-Jiki, Mirror Breaker + Hellkite Courser + Umbral Collar Zealot

Kiki-Jiki, Mirror Breaker

Hellkite Courser

Umbral Collar Zealot

How it works

1. Activate Kiki-Jiki by tapping it, creating a token copy of Hellkite Courser with haste.
2. The Hellkite Courser token enters the battlefield, triggering its ability.
3. Holding priority, activate Umbral Collar Zealot by sacrificing Kiki-Jiki.
4. Choose to return Kiki-Jiki to the command zone from your graveyard.
5. Resolve the Umbral Collar Zealot trigger from step 3.
6. Resolve the Hellkite Courser trigger from step 2, putting Kiki-Jiki from the command zone onto the battlefield.
7. Repeat.