Rakdos, the Muscle + Shambling Ghast + Haunted Crossroads + Prosper, Tome-Bound + Phantom Train

Rakdos, the Muscle

Shambling Ghast

Haunted Crossroads

Prosper, Tome-Bound

Phantom Train

How it works

1. Activate Phantom Train 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 Phantom Train ability, putting a +1/+1 counter on it.
8. Cast Shambling Ghast from exile by paying 1.
9. Prosper triggers, creating a Treasure token.
10. Activate the Treasure by tapping and sacrificing it, adding 1.
11. Repeat.