Junji, the Midnight Sky, Spawning Pit, Metamorphosis Fanatic, and Sultai Flayer

Prerequisites

• Junji, the Midnight Sky on the battlefield
• Spawning Pit on the battlefield
• Metamorphosis Fanatic on the battlefield
• Sultai Flayer on the battlefield

Steps

1. Activate Spawning Pit by sacrificing Metamorphosis Fanatic
2. When Metamorphosis Fanatic dies, Sultai Flayer triggers, causing you to gain 4 life
3. Resolve the Spawning Pit ability
4. Activate Spawning Pit by sacrificing Junji
5. When Junji dies, it and Sultai Flayer trigger
6. Resolve the Sultai Flayer trigger, causing you to gain 4 life
7. Resolve the Junji trigger, returning Metamorphosis Fanatic from your graveyard to the battlefield and causing you to lose 2 life
8. When Metamorphosis Fanatic enters, it triggers, returning Junji from your graveyard to the battlefield
9. Resolve the Spawning Pit ability
10. Repeat

Results

• Infinite charge counters on a permanent
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite lifegain
• Infinite lifegain triggers