Verdant Succession + Serra Avatar + Altar of Dementia + Painter's Servant

Verdant Succession

Serra Avatar

Altar of Dementia

Painter's Servant

How it works

1. Activate Altar of Dementia by sacrificing Serra Avatar.
2. Serra Avatar and Verdant Succession trigger.
3. Resolve the Serra Avatar trigger, shuffling it into your library.
4. Resolve the Verdant Succession trigger, searching your library for Serra Avatar, 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 Serra Avatar's power.
6. Repeat.