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

Prerequisites

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

Steps

1. Activate Altar of Dementia by sacrificing Golgari Thug
2. Golgari Thug dies, triggering itself and Dross Harvester
3. Resolve the Golgari Thug trigger, putting itself on top of your library from your graveyard
4. Resolve the Dross Harvester trigger, causing you to gain two life
5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Golgari Thug's power
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