Enduring Renewal, Deathrender, and Altar of Dementia

Prerequisites

• Enduring Renewal on the battlefield
• Deathrender on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing the creature with Deathrender attached
2. When the creature dies, Enduring Renewal and Deathrender trigger
3. Resolve the Enduring Renewal trigger, returning the creature from your graveyard to your hand
4. Resolve the Deathrender trigger, putting the creature from your hand onto the battlefield, and attaching Deathrender to it
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
6. Repeat

Results

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