Su-Chi, Fool's Demise, and Phyrexian Altar

Prerequisites

• Su-Chi on the battlefield
• Fool's Demise on the battlefield
• Phyrexian Altar on the battlefield
• Fool's Demise attached to Su-Chi

Steps

1. Activate Phyrexian Altar by sacrificing Su-Chi, adding
2. Su-Chi dies, triggering itself and Fool's Demise first and second abilities
3. Resolve the Su-Chi trigger, adding
4. Resolve the second Fool's Demise trigger, returning it from your graveyard to your hand
5. Resolve the first Fool's Demise trigger, returning Su-Chi from your graveyard to the battlefield
6. Cast Fool's Demise by paying , attaching it to Su-Chi
7. Repeat

Results

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