Body Launderer + Karmic Guide + Yahenni, Undying Partisan

Body Launderer

Karmic Guide

Yahenni, Undying Partisan

How it works

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