Optimus Prime, Hero // Optimus Prime, Autobot Leader, Luminous Broodmoth, and Altar of Dementia

Prerequisites

• Optimus Prime, Hero // Optimus Prime, Autobot Leader on the battlefield
• Luminous Broodmoth on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Optimus Prime, Hero
2. When Optimus Prime, Hero dies, its second ability triggers, returning it from your graveyard to the battlefield as Optimus Prime, Autobot Leader
3. Activate Altar of Dementia by sacrificing Optimus Prime, Autobot Leader
4. When Optimus Prime, Autobot Leader dies, Luminous Broodmoth triggers, returning Optimus Prime from your graveyard to the battlefield as Optimus Prime, Hero with a flying counter on it
5. Resolve both Altar of Dementia abilities from steps 1 and 3, causing target player to mill cards equal to Optimus Prime, Hero and Optimus Prime, Autobot Leader's combined power
6. Repeat

Results

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