Body Launderer + Karmic Guide + Phantom Train

Body Launderer

Karmic Guide

Phantom Train

How it works

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