Kiki-Jiki, Mirror Breaker, Hellkite Courser, and Phantom Train

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Hellkite Courser on the battlefield
• Phantom Train on the battlefield

Steps

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 Phantom Train by sacrificing Kiki-Jiki
4. Choose to return Kiki-Jiki to the command zone from your graveyard
5. Resolve the Phantom Train 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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite creature tokens with haste
• Infinite +1/+1 counters on a creature