Junji, the Midnight Sky + Phyrexian Altar + Metamorphosis Fanatic + Susurian Voidborn

Junji, the Midnight Sky

Phyrexian Altar

Metamorphosis Fanatic

Susurian Voidborn

How it works

1. Activate Phyrexian Altar by sacrificing Metamorphosis Fanatic.
2. When Metamorphosis Fanatic dies, Susurian Voidborn triggers, causing you to gain 1 life and target opponent to lose 1 life.
3. Activate Phyrexian Altar by sacrificing Junji.
4. When Junji dies, it and Susurian Voidborn trigger.
5. Resolve the Susurian Voidborn trigger, causing you to gain 1 life and target opponent to lose 1 life.
6. Resolve the Junji trigger, returning Metamorphosis Fanatic from your graveyard to the battlefield and causing you to lose 2 life.
7. When Metamorphosis Fanatic enters, it triggers, returning Junji from your graveyard to the battlefield.
8. Repeat.