Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Evereth, Viceroy of Plunder + Nylea, Keen-Eyed

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Evereth, Viceroy of Plunder

Nylea, Keen-Eyed

How it works

1. Activate Evereth 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 Evereth 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 loop leverages Rakdos, the Muscle to exile and chew through your entire library by weaponizing a closed cycle of sacrifices and recursion. You begin by using Evereth, Viceroy of Plunder to sacrifice Priest of Gix, which triggers Rakdos's exile ability and provides the opening to float black mana. Before that exile resolves, Haunted Crossroads lets you tuck the Priest right back onto the top of your library so Rakdos can legally exile it. Once you cast the Priest from exile for cheap thanks to Nylea, Keen-Eyed reducing creature spell costs, its entry triggers to refund your mana supply, allowing you to feed the cycle infinitely.