Kiki-Jiki, Mirror Breaker, Altar of Dementia, and Metamorphosis Fanatic

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Altar of Dementia on the battlefield
• Metamorphosis Fanatic on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, targeting Metamorphosis Fanatic Holding priority, activate Altar of Dementia by sacrificing Kiki-Jiki Resolve the Kiki-Jiki ability, creating a token copy of Metamorphosis Fanatic with haste
2. When the Metamorphosis Fanatic token enters, it triggers, returning Kiki-JIki from your graveyard to the battlefield
3. Repeat

Results

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