Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Goblin Bombardment + Umori, the Collector

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Goblin Bombardment

Umori, the Collector

How it works

1. Activate Goblin Bombardment 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 Goblin Bombardment ability from step 1, dealing 1 damage to any target.
6. Cast Priest of Gix from exile by paying 2.
7. When Priest of Gix enters the battlefield, it triggers, adding .
8. Repeat.

This fascinating loop relies on Goblin Bombardment to sacrifice Priest of Gix, sending it to the graveyard while its death triggers Rakdos, the Muscle's ability to exile the top three cards of your library. Before that exile resolves, you use Haunted Crossroads to place the Priest right back onto the top of your library, ensuring it is waiting there to be cast out of exile. Thanks to Umori, the Collector reducing its cost by {1}, the Priest of Gix's entry mana generation yields a net positive return of {B}{B}, fueling the recursion indefinitely and turning your deck into a bottomless resource.