Mortuary + Experimental Frenzy + Priest of Urabrask + Altar of Dementia

Mortuary

Experimental Frenzy

Priest of Urabrask

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Priest of Urabrask.
2. When Priest of Urabrask dies, Mortuary triggers, putting Priest of Urabrask on top of your library from your graveyard.
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Priest of Urabrask's power.
4. Cast Priest of Urabrask from the top of your library by paying 2.
5. When Priest of Urabrask enters the battlefield, it triggers, adding .
6. Repeat.