How can you create a combo with Wilhelt, the Rotcleaver, Shambling Ghast, Chthonian Nightmare, Pitiless Plunderer, Yahenni, Undying Partisan?
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[START OF COMBO]This combo can be formed with Wilhelt, the Rotcleaver, Shambling Ghast, Chthonian Nightmare, Pitiless Plunderer, Yahenni, Undying Partisan

Color identity: UB
Mana cost: 
Steps:
  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}{B}.
  7. Cast Chthonian Nightmare by paying {1}{B}.
  8. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
  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.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite storm count
  - Infinite energy counters[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Wilhelt, the Rotcleaver must be on the battlefield
  - Shambling Ghast must be on the battlefield
  - Chthonian Nightmare must be in your hand
  - Pitiless Plunderer must be on the battlefield
  - Yahenni, Undying Partisan must be on the battlefield
[END OF COMBO PREREQUISITES]
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