Chthonian Nightmare, Pitiless Plunderer, Greedy Freebooter, and Impulsive Pilferer

Prerequisites

• Chthonian Nightmare in hand
• Pitiless Plunderer on the battlefield
• Greedy Freebooter on the battlefield or in the graveyard
• Impulsive Pilferer on the battlefield or in the graveyard
• available

Steps

1. Cast Chthonian Nightmare by paying
2. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
3. Activate Chthonian Nightmare by paying an amount of , sacrificing Greedy Freebooter or Impulsive Pilferer and returning Chthonian Nightmare from the battlefield to your hand
4. When Greedy Freebooter or Impulsive Pilferer dies, it and Pitiless Plunderer trigger, creating two Treasure tokens
5. Resolve the Chthonian Nightmare ability, returning either Greedy Freebooter or Impulsive Pilferer from your graveyard to the battlefield
6. Activate the Treasures by tapping and sacrificing them, adding
7. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite energy counters
• Infinite sacrifice triggers
• Infinite storm count