Ashiok's Reaper, Mortuary, Phyrexian Altar, and Nyxborn Shieldmate

Prerequisites

• Ashiok's Reaper on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield
• Nyxborn Shieldmate on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Nyxborn Shieldmate, adding
2. When Nyxborn Shieldmate dies, Mortuary and Ashiok's Reaper trigger
3. Resolve the Mortuary trigger, putting Nyxborn Shieldmate on top of your library from your graveyard
4. Resolve the Ashiok's Render trigger, causing you to draw Nyxborn Shieldmate from your library
5. Cast Nyxborn Shieldmate by paying
6. Repeat

Results

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