Golgari Thug, Altar of Dementia, Bolas's Citadel, and Dross Harvester

Prerequisites

• Golgari Thug on the battlefield
• Altar of Dementia on the battlefield
• Bolas's Citadel on the battlefield
• Dross Harvester on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Golgari Thug
2. When Golgari Thug dies, it and Dross Harvester trigger
3. Resolve the Golgari Thug trigger, putting it from your graveyard onto the top of your library
4. Resolve the Dross Harvester trigger, causing you to gain 2 life
5. Resolve the Altar of Dementia ability
6. Cast Golgari Thug from the top of your library by paying 2 life
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite lifegain triggers
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count