Verdant Succession, Ulamog, the Infinite Gyre, Altar of Dementia, and Painter's Servant

Prerequisites

• Verdant Succession on the battlefield
• Ulamog, the Infinite Gyre on the battlefield
• Altar of Dementia on the battlefield
• Painter's Servant on the battlefield
• "Green" chosen with Painter's Servant

Steps

1. Activate Altar of Dementia by sacrificing Ulamog
2. Ulamog and Verdant Succession trigger
3. Resolve the Ulamog trigger, shuffling your graveyard into your library
4. Resolve the Verdant Succession trigger, searching your library for Ulamog, putting it onto the battlefield and shuffling your library
5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Ulamog's power
6. Repeat

Results

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