Verdant Succession + Vigor + Altar of Dementia

Verdant Succession

Vigor

Altar of Dementia

How it works

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