Archghoul of Thraben, Mortuary, Rooftop Storm, and Altar of Dementia

Prerequisites

• Archghoul of Thraben on the battlefield
• Mortuary on the battlefield
• Rooftop Storm on the battlefield
• Altar of Dementia on the battlefield
• You control another nontoken Zombie

Steps

1. Activate Altar of Dementia by sacrificing Archghoul of Thraben
2. Mortuary and Archghoul of Thraben trigger
3. Resolve the Mortuary trigger, putting Archghoul of Thraben on top of your library from your graveyard
4. Resolve the Archghoul of Thraben trigger, revealing Archghoul of Thraben from the top of your library and putting it into your hand
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Archghoul of Thraben's power
6. Cast Archghoul of Thraben by paying
7. Repeat

Results

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