Saffi Eriksdotter + Umbral Collar Zealot + Renegade Rallier

Saffi Eriksdotter

Umbral Collar Zealot

Renegade Rallier

How it works

1. Activate Saffi by sacrificing it, targeting Renegade Rallier
2. Activate Umbral Collar Zealot by sacrificing Renegade Rallier
3. When Renegade Rallier dies, Saffi triggers, returning Renegade Rallier from your graveyard to the battlefield.
4. When Renegade Rallier enters, it triggers, returning Saffi from your graveyard to the battlefield.
5. Resolve the Umbral Collar Zealot ability.
6. Repeat.