Colossal Grave-Reaver, Altar of Dementia, and Golgari Thug

Prerequisites

• Colossal Grave-Reaver on the battlefield
• Altar of Dementia on the battlefield
• Golgari Thug on the battlefield
• undefined

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers