Archghoul of Thraben, Mortuary, Shambling Ghast, and Carrion Feeder

Prerequisites

• Archghoul of Thraben on the battlefield
• Mortuary on the battlefield
• Shambling Ghast on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing Shambling Ghast
2. When Shambling Ghast dies, it, Mortuary and Archghoul of Thraben trigger
3. Resolve the Mortuary trigger, putting Shambling Ghast on top of your library
4. Resolve the Shambling Ghast trigger, creating a Treasure artifact token
5. Resolve the Archghoul of Thraben trigger, revealing Shambling Ghast from the top of your library and putting it into your hand
6. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
7. Activate the Treasure by tapping and sacrificing it, adding
8. Cast Shambling Ghast by paying
9. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count