Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Ezzaroot Channeler + Phantom Train

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Ezzaroot Channeler

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Priest of Gix.
2. When Priest of Gix dies, Rakdos triggers.
3. Holding priority, activate Haunted Crossroads by paying , putting Priest of Gix from your graveyard onto the top of your library.
4. Resolve the Rakdos trigger, causing you to exile the top three cards of your library with the ability to play them until your next end step.
5. Resolve the Phantom Train ability from step 1.
6. Cast Priest of Gix from exile by paying at most 2.
7. When Priest of Gix enters the battlefield, it triggers, adding .
8. Repeat.

This clever loop relies on Haunted Crossroads to continually stack Priest of Gix on top of your library so it can be repeatedly cast from exile using the mana it generates. Rakdos, the Muscle serves as the sacrificial engine and exile hub, turning every iteration into a way to dig through your entire library while keeping the costs manageable with Ezzaroot Channeler's cost reduction and life gain. Finally, Phantom Train acts as the sacrifice outlet that keeps the cycle moving while piling up infinite +1/+1 counters for your efforts.