Saffi Eriksdotter + Renegade Rallier + Altar of Dementia

Saffi Eriksdotter

Renegade Rallier

Altar of Dementia

How it works

1. Activate Saffi by sacrificing it, targeting Renegade Rallier.
2. Activate Altar of Dementia 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 the battlefield, it triggers, returning Saffi from your graveyard to the battlefield.
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Renegade Rallier's power.
6. Repeat.