Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Blasting Station + Semblance Anvil

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Blasting Station

Semblance Anvil

How it works

1. Activate Blasting Station by tapping it and 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 Blasting Station ability from step 1, dealing 1 damage to any target.
6. Cast Priest of Gix from exile by paying 1.
7. When Priest of Gix enters the battlefield, it and Blasting Station trigger.
8. Resolve the Priest of Gix trigger, adding .
9. Resolve the Blasting Station trigger, untapping it.
10. Repeat.

This ingenious engine turns a single black mana into a self-sustaining loop of sacrifice and recursion by leveraging cost reduction and mana production. With Semblance Anvil having previously exiled a creature card to discount your creature spells by {2}, Priest of Gix can be cast from exile for just {1} while netting three black mana upon entry. Every time you sacrifice that Priest to Blasting Station, it deals damage to any target while triggering Rakdos, the Muscle to aggressively dig through your library. Haunted Crossroads then bridges the gap for a single black mana, placing the fallen Priest right back on top of your library so Rakdos can exile it again, keeping the infinite loop firing continuously.