Karmic Guide + Body Double + Umbral Collar Zealot

Karmic Guide

Body Double

Umbral Collar Zealot

How it works

1. Cast Body Double by paying 4, choosing to have it enter the battlefield as a copy of Karmic Guide.
2. When Body Double enters the battlefield, it triggers, targeting Karmic Guide.
3. Holding priority, activate Umbral Collar Zealot by sacrificing Body Double.
4. Resolve the Body Double trigger, returning Karmic Guide from your graveyard to the battlefield.
5. When Karmic Guide enters the battlefield, it triggers, targeting Body Double.
6. Holding priority, activate Umbral Collar Zealot by sacrificing Karmic Guide.
7. Resolve the Karmic Guide trigger, returning Body Double from your graveyard to the battlefield as a copy of Karmic Guide.
8. Repeat from step 2.

This clever loop relies on an endless resurrection cycle between Karmic Guide and Body Double, which enters the graveyard as a copy of Karmic Guide to keep the chain alive. With Umbral Collar Zealot sitting safely on the battlefield to instantly sacrifice whichever creature just entered, you can continually trigger their enters-the-battlefield abilities to pull each other right back out of the graveyard. This dance generates an infinite stream of sacrifice and death triggers while feeding your graveyard with endless surveil.