Rakdos, the Muscle + Shambling Ghast + Haunted Crossroads + Thermopod

Rakdos, the Muscle

Shambling Ghast

Haunted Crossroads

Thermopod

How it works

1. Activate Thermopod's second ability by sacrificing Shambling Ghast, adding .
2. When Shambling Ghast dies, it and Rakdos trigger.
3. Resolve the Shambling Ghast trigger, creating a Treasure token.
4. Activate the Treasure by tapping and sacrificing it, adding .
5. Holding priority, activate Haunted Crossroads by paying , putting Shambling Ghast from your graveyard onto the top of your library.
6. Resolve the Rakdos trigger, exiling Shambling Ghast from the top of your library with the ability to cast it until your next turn.
7. Cast Shambling Ghast from exile by paying 1.
8. Repeat.

This clever loop lets you endlessly sacrifice and recast Shambling Ghast by cycling it between the graveyard, library, and exile using Haunted Crossroads and Rakdos, the Muscle. Thermopod provides the red mana required to fuel the loop while converting each iteration into a sacrifice trigger, and the Treasure generated by Shambling Ghast's death pays the black mana needed for Haunted Crossroads to retrieve it. Because Rakdos allows you to play the exiled Shambling Ghast using mana of any type, the entire engine becomes self-sustaining and endlessly repeatable.