Kiki-Jiki, Mirror Breaker, Hellkite Courser, and Altar of Dementia

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Hellkite Courser on the battlefield
• Altar of Dementia 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 Altar of Dementia by sacrificing Kiki-Jiki
4. Choose to return Kiki-Jiki to the command zone from your graveyard
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Kiki-Jiki's power
6. Resolve the Hellkite Courser trigger from step 2, putting Kiki-Jiki from the command zone onto the battlefield
7. Repeat

Results

• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill