Junji, the Midnight Sky + Spawning Pit + Vengeful Bloodwitch + Metamorphosis Fanatic

Junji, the Midnight Sky

Spawning Pit

Vengeful Bloodwitch

Metamorphosis Fanatic

How it works

1. Activate Spawning Pit by sacrificing Metamorphosis Fanatic.
2. When Metamorphosis Fanatic dies, Vengeful Bloodwitch triggers, causing an opponent to lose 1 life and you to gain 1 life.
3. Resolve the Spawning Pit ability.
4. Activate Spawning Pit by sacrificing Junji.
5. When Junji dies, it and Vengeful Bloodwitch trigger.
6. Resolve the Vengeful Bloodwitch trigger, causing an opponent to lose 1 life and you to gain 1 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.