Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Viscera Seer + Planar Gate

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Planar Gate

How it works

1. Activate Viscera Seer 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 Viscera Seer ability from step 1, causing you to scry 1.
6. Cast Priest of Gix from exile by paying 2.
7. When Priest of Gix enters the battlefield, it triggers, adding .
8. Repeat.

This clever loop turns your graveyard and library into a self-sustaining engine by reducing costs with Planar Gate, allowing you to cast Priest of Gix from exile for just two mana while generating three black mana on entry. Viscera Seer provides the free sacrifice outlet needed to put the Priest into the graveyard, where Haunted Crossroads can immediately place it back on top of your library just in time to be exiled by Rakdos, the Muscle's trigger. As this sacrifice cycle spins out of control, Rakdos lets you exile and play your entire library while generating infinite black mana, infinite death triggers, and infinite scry 1s to set up your win.