Junji, the Midnight Sky + Phyrexian Altar + Karmic Guide + Susurian Voidborn

Junji, the Midnight Sky

Phyrexian Altar

Karmic Guide

Susurian Voidborn

How it works

1. Activate Phyrexian Altar by sacrificing Karmic Guide.
2. When Karmic Guide 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 Karmic Guide from your graveyard to the battlefield and causing you to lose 2 life.
7. When Karmic Guide enters, it triggers, returning Junji from your graveyard to the battlefield.
8. Repeat.