Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Viscera Seer + Helm of Awakening

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Helm of Awakening

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 loop hinges on a clever cost-reduction setup: Helm of Awakening cheapens Priest of Gix so that its enter-the-battlefield mana generation fully covers both its casting cost and the {B} activation fee for Haunted Crossroads. Viscera Seer provides the free sacrifice outlet needed to put the Priest into the graveyard, while Rakdos, the Muscle capitalizes on those constant sacrifices by exiling your library card by card so you can continuously cast it from exile.