Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Skittering Precursor + Phantom Train

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Skittering Precursor

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Priest of Gix.
2. When Priest of Gix dies, Skittering Precursor and Rakdos trigger.
3. Resolve the Skittering Precursor trigger, creating a 0/1 Eldrazi Spawn creature token.
4. Holding priority, activate Haunted Crossroads by paying , putting Priest of Gix from your graveyard onto the top of your library.
5. 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.
6. Resolve the Phantom Train ability from step 1, putting a +1/+1 counter on it.
7. Activate the Eldrazi Spawn by sacrificing it, adding C.
8. Cast Priest of Gix from exile by paying 3.
9. When Priest of Gix enters the battlefield, it triggers, adding .
10. Repeat.

This cunning loop relies on Phantom Train to constantly consume and resurrect Priest of Gix, utilizing the black mana it produces to repeatedly fuel Haunted Crossroads. As Priest of Gix cycles back from the graveyard onto your library, Rakdos, the Muscle effortlessly exiles your entire library one chunk at a time while granting itself vital protection. Meanwhile, Skittering Precursor works behind the scenes to harvest every single sacrifice by churning out Eldrazi Spawn tokens, providing the colorless mana needed to recast the priest from exile and keep the engine endlessly humming.