Saffi Eriksdotter + Jackdaw Savior + Ashnod's Altar

Saffi Eriksdotter

Jackdaw Savior

Ashnod's Altar

How it works

1. Activate Saffi by sacrificing it, targeting Jackdaw Savior.
2. Activate Ashnod's Altar by sacrificing Jackdaw Savior, adding CC.
3. When Jackdaw Savior dies, it and Saffi trigger.
4. Resolve the Jackdaw Savior trigger, returning Saffi from your graveyard to the battlefield.
5. Resolve the Saffi trigger, returning Jackdaw Savior from your graveyard to the battlefield.
6. Repeat.