Wilhelt, the Rotcleaver + Shambling Ghast + Chthonian Nightmare + Pitiless Plunderer + Yahenni, Undying Partisan

Wilhelt, the Rotcleaver

Shambling Ghast

Chthonian Nightmare

Pitiless Plunderer

Yahenni, Undying Partisan

How it works

1. Activate Yahenni 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 Yahenni ability from step 1.
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.