Wilhelt, the Rotcleaver + Shambling Ghast + Chthonian Nightmare + Pitiless Plunderer + Altar of Dementia

Wilhelt, the Rotcleaver

Shambling Ghast

Chthonian Nightmare

Pitiless Plunderer

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Shambling Ghast.
2. When Shambling Ghast dies, it, Pitiless Plunderer and Wilhelt's first ability trigger.
3. Resolve the Shambling Ghast and Pitiless Plunderer triggers, creating two Treasure tokens.
4. Resolve the Wilhelt trigger, creating a 2/2 Zombie creature token with decayed.
5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Shambling Ghast's power.
6. Activate the Treasures by tapping and sacrificing them, adding 1.
7. Cast Chthonian Nightmare by paying 1.
8. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
9. Activate Chthonian Nightmare by paying E, sacrificing the Zombie token, and returning Chthonian Nightmare from the battlefield to your hand, returning Shambling Ghast from your graveyard to the battlefield.
10. Repeat.