Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Viscera Seer + Skittering Precursor

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Skittering Precursor

How it works

1. Activate Viscera Seer 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 Viscera Seer ability from step 1, causing you to scry 1.
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 intricate loop relies on looping Priest of Gix through your graveyard to generate continuous black mana, which is then filtered through Haunted Crossroads to place the Priest right back on top of your library. From there, Viscera Seer acts as the sacrificial outlet while providing scry utility, and Skittering Precursor turns each sacrifice into an Eldrazi Spawn token to help fund your casting costs and mana requirements. Finally, Rakdos, the Muscle oversees the entire operation by turning every single creature sacrifice into exiled cards from your opponents' libraries that you are free to play, gradually dismantling your rivals while you combo off infinitely.