Disa the Restless + Altar of Dementia + Arcane Adaptation + Golgari Thug

Disa the Restless

Altar of Dementia

Arcane Adaptation

Golgari Thug

How it works

1. Activate Altar of Dementia by sacrificing Golgari Thug.
2. When Golgari Thug dies, it triggers, putting itself from your graveyard onto the top of your library.
3. Resolve the Altar of Dementia ability, causing you to mill cards equal to Golgari Thug's power, which will cause you to mill Golgari Thug.
4. As Golgari Thug is a Lhurgoyf due to Arcane Adaptation, Disa's first ability triggers, returning Golgari Thug from your graveyard to the battlefield.
5. Repeat.