Mortuary, Experimental Frenzy, Cathodion, and Altar of Dementia

Prerequisites

• Mortuary on the battlefield
• Experimental Frenzy on the battlefield
• Cathodion on the battlefield
• Altar of Dementia on the battlefield

Steps

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

Results

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