Saffi Eriksdotter + Spawning Pit + Karmic Guide

Saffi Eriksdotter

Spawning Pit

Karmic Guide

How it works

1. Activate Saffi by sacrificing it, targeting Karmic Guide
2. Activate Spawning Pit by sacrificing Karmic Guide
3. When Karmic Guide dies, Saffi triggers, returning Karmic Guide from your graveyard to the battlefield.
4. When Karmic Guide enters, it triggers, returning Saffi from your graveyard to the battlefield.
5. Resolve the Spawning Pit ability.
6. Repeat.