Rakdos, the Muscle, Shambling Ghast, Haunted Crossroads, Prosper, Tome-Bound, and Altar of Dementia

Prerequisites

• Rakdos, the Muscle on the battlefield
• Shambling Ghast on the battlefield
• Haunted Crossroads on the battlefield
• Prosper, Tome-Bound on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia 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 Altar of Dementia ability, causing target player to mill cards equal to Shambling Ghast's power
8. Cast Shambling Ghast from exile by paying
9. Prosper triggers, creating a Treasure token
10. Activate the Treasure by tapping and sacrificing it, adding
11. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite mill
• Infinite self-mill