Rakdos, the Muscle + Priest of Gix + Haunted Crossroads + Viscera Seer + Honest Rutstein

Rakdos, the Muscle

Priest of Gix

Haunted Crossroads

Viscera Seer

Honest Rutstein

How it works

1. Activate Viscera Seer 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 Viscera Seer 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 uses Rakdos, the Muscle as the engine to exile your entire library while generating an endless cycle of creature sacrifices and enters-the-battlefield triggers. By feeding Priest of Gix to Viscera Seer, you trigger Rakdos to exile cards equal to the priest's mana value, which you can cast because Honest Rutstein's cost reduction lowers the priest's mana cost to just two generic mana—leaving you a net positive black mana each time thanks to the priest generating three dark mana upon entry. Meanwhile, Haunted Crossroads steps in to place Priest of Gix right back on top of your library in response to the sacrifice, ensuring it is conveniently waiting among the exiled cards for you to replay and keep the chain going indefinitely.