Junji, the Midnight Sky + Phyrexian Altar + Karmic Guide + Vengeful Bloodwitch

Junji, the Midnight Sky

Phyrexian Altar

Karmic Guide

Vengeful Bloodwitch

How it works

1. Activate Phyrexian Altar by sacrificing Karmic Guide.
2. When Karmic Guide dies, Vengeful Bloodwitch 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 Vengeful Bloodwitch trigger.
5. Resolve the Vengeful Bloodwitch 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.