Remembrance, Deathrender, Arashin Sovereign, and Altar of Dementia

Prerequisites

• Remembrance on the battlefield
• Deathrender on the battlefield
• Arashin Sovereign on the battlefield
• Altar of Dementia on the battlefield
• All permanents on the battlefield
• Deathrender attached to Arashin Sovereign

Steps

1. Activate Altar of Dementia by sacrificing Arashin Sovereign
2. When Arashin Sovereign dies, it, Deathrender and Remembrance trigger
3. Resolve the Arashin Sovereign trigger, causing you to put it on top of your library from your graveyard
4. Resolve the Remembrance trigger, causing you to search your library for Arashin Sovereign and put it into your hand
5. Resolve the Deathrender trigger, putting Arashin Sovereign from your hand onto the battlefield, and attaching Deathrender to it
6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Arashin Sovereign's power
7. Repeat

Results

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