Colossal Grave-Reaver, Altar of Dementia, and God-Eternal Kefnet

Prerequisites

• Colossal Grave-Reaver on the battlefield
• Altar of Dementia on the battlefield
• God-Eternal Kefnet on the battlefield
• undefined

Steps

1. Activate Altar of Dementia by sacrificing God-Eternal Kefnet
2. When God-Eternal Kefnet dies, it triggers, putting itself into your library third from the top
3. Resolve the Altar of Dementia ability, causing you to mill cards equal to God-Eternal Kefnet's power, ultimately milling God-Eternal Kefnet
4. Colossal Grave-Reaver's second ability triggers, putting God-Eternal Kefnet from your graveyard onto the battlefield
5. Repeat

Results

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