Ashiok's Reaper, Mortuary, Phyrexian Altar, and Hypnotic Siren

Prerequisites

• Ashiok's Reaper on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield
• Hypnotic Siren on the battlefield

Steps

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

Results

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