Rakdos, the Muscle + Shambling Ghast + Haunted Crossroads + Birgi, God of Storytelling // Harnfel, Horn of Bounty + Carrion Feeder

Rakdos, the Muscle

Shambling Ghast

Haunted Crossroads

Birgi, God of Storytelling // Harnfel, Horn of Bounty

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing Shambling Ghast.
2. When Shambling Ghast dies, it and Rakdos trigger.
3. Resolve the Shambling Ghast trigger, creating a Treasure token.
4. Activate the Treasure by tapping and sacrificing it, adding .
5. Holding priority, activate Haunted Crossroads by paying , putting Shambling Ghast from your graveyard onto the top of your library.
6. Resolve the Rakdos trigger, exiling Shambling Ghast from the top of your library with the ability to cast it until your next turn.
7. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
8. Cast Shambling Ghast from exile by paying 1.
9. Birgi triggers, adding .
10. Repeat.

This loop turns a modest sacrifice engine into a relentless engine of recurrence by turning your graveyard into an extension of your hand. You start by feeding Shambling Ghast to Carrion Feeder, whose death triggers generate a Treasure token and fuel Rakdos, the Muscle's ability to exile the Ghast right back off the top of your library. Haunted Crossroads ensures the Ghast always finds its way to the top of your library for Rakdos to catch, while the mana produced by the Treasure effortlessly pays for that graveyard recycling. Meanwhile, Birgi, God of Storytelling provides a steady stream of red mana with every re-casting of the Ghast, letting you churn through your loop to grow an infinitely large Carrion Feeder alongside an ever-growing storm count.