Saffi Eriksdotter + Umbral Collar Zealot + Karmic Guide

Saffi Eriksdotter

Umbral Collar Zealot

Karmic Guide

How it works

1. Activate Saffi by sacrificing it, targeting Karmic Guide
2. Activate Umbral Collar Zealot 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 Umbral Collar Zealot ability.
6. Repeat.