Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Goblin Bombardment + Ezzaroot Channeler

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Goblin Bombardment

Ezzaroot Channeler

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.
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 clever loop relies on Goblin Bombardment to repeatedly send Priest of Gix to the graveyard, where its entry mana of three black is more than enough to offset the single black mana needed to recur it with Haunted Crossroads. Meanwhile, Rakdos, the Muscle watches these sacrifices happen, exiling your entire library card by card so you can freely cast whatever you need from exile—fueled in part by Ezzaroot Channeler discounting your creature spells as you gain life. Because Priest of Gix keeps cycling back from the top of your library into play, you generate an endless storm of death triggers and damage while netting infinite black mana to close out the game.