Body Launderer + Karmic Guide + Umbral Collar Zealot

Body Launderer

Karmic Guide

Umbral Collar Zealot

How it works

1. Activate Umbral Collar Zealot by sacrificing Karmic Guide.
2. When Karmic Guide dies, Body Launderer's first ability triggers, causing Body Launderer to connive.
3. Resolve the Umbral Collar Zealot ability.
4. Activate Umbral Collar Zealot 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 Umbral Collar Zealot ability.
8. Repeat.