Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Jet Medallion + Yahenni, Undying Partisan

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Jet Medallion

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni ability from step 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 turns a simple sacrifice into a self-sustaining engine by exploiting the mana generated from a familiar face. When you use Yahenni, Undying Partisan to sacrifice Priest of Gix, the Priest's entry trigger already provided three black mana, while Jet Medallion steps in to discount the re-cast cost so you can deploy the creature entirely off its own refunded energy. Haunted Crossroads acts as the crucial glue that intercepts the Priest in the graveyard, sliding it right back to the top of your library so that Rakdos, the Muscle's exile trigger can safely pluck it out for another round.