Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Viscera Seer + Hamza, Guardian of Arashin

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Hamza, Guardian of Arashin

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 at most 2.
7. When Priest of Gix enters the battlefield, it triggers, adding .
8. Repeat.

This loop relies on a clever convergence of mana production and recursive casting, anchored by the cost-reducing power of Hamza, Guardian of Arashin. You use Viscera Seer to sacrifice Priest of Gix, triggering Rakdos, the Muscle to exile the top of your library while you rescue Priest of Gix from the graveyard using Haunted Crossroads. Thanks to Hamza reducing its cost to a mere {2}, you can easily recast the Priest using the {B}{B}{B} it generates upon entering the battlefield, leaving you with infinite black mana and leaving your opponent's entire library exiled for you to play.