Saffi Eriksdotter + Mistmoon Griffin + Grimgrin, Corpse-Born

Saffi Eriksdotter

Mistmoon Griffin

Grimgrin, Corpse-Born

How it works

1. Activate Saffi by sacrificing it, targeting Mistmoon Griffin.
2. Activate Grimgrin by sacrificing Mistmoon Griffin.
3. When Mistmoon Griffin dies, it and Saffi trigger.
4. Resolve the Saffi trigger, returning Mistmoon Griffin from your graveyard to the battlefield.
5. Resolve the Mistmoon Griffin trigger, failing to exile it as it is not in your graveyard and then returning Saffi from your graveyard to the battlefield.
6. Resolve the Grimgrin ability.
7. Repeat.