Saffi Eriksdotter + Body Launderer + Yahenni, Undying Partisan

Saffi Eriksdotter

Body Launderer

Yahenni, Undying Partisan

How it works

1. Activate Saffi by sacrificing it, targeting Body Launderer.
2. When Saffi dies, Body Launderer's first ability triggers, causing it to connive.
3. Activate Yahenni by sacrificing Body Launderer.
4. When Body Launderer dies, its second ability and Saffi trigger.
5. Resolve the Saffi trigger, returning Body Launderer from your graveyard to the battlefield.
6. Resolve the Body Launderer trigger, returning Saffi from your graveyard to the battlefield.
7. Resolve the Yahenni ability.
8. Repeat.