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Chthonian Nightmare + Dockside Extortionist

Produces: Infinite artifact ETB, Infinite artifact LTB, Infinite artifact sacrifice triggers, Infinite artifact tokens, Infinite colored mana, Infinite death triggers, Infinite energy counters, Infinite creature ETB, Infinite creature LTB, Infinite creature sacrifice triggers, Infinite storm count, Infinite Treasure tokens

Multicolore
Color identity
BR

Prerequisites

You have at least two energy counters. Opponents control at least four artifacts and/or enchantments. You control another nontoken creature with mana value 4 or less.

Steps

  1. Activate Chthonian Nightmare by paying {E}{E}, sacrificing a nontoken creature with mana value 4 or less and returning Chthonian Nightmare from the battlefield to your hand, returning Dockside Extortionist from your graveyard to the battlefield.
  2. When Dockside Extortionist enters the battlefield, it triggers, creating at least four Treasure tokens.
  3. Activate four Treasures by tapping and sacrificing them, adding {2}{B}{B}.
  4. Cast Chthonian Nightmare by paying {1}{B}.
  5. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
  6. Activate Chthonian Nightmare by paying at most {E}{E}{E}{E}, sacrificing Dockside Extortionist and returning Chthonian Nightmare from the battlefield to your hand, returning a creature with mana value 4 or less from your graveyard to the battlefield.
  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. Repeat.
  10. If opponents control five or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.
  11. If the creature sacrificed has mana value 3 or less, this combo nets infinite energy counters.

How to execute this combo

The "Chthonian Nightmare + Dockside Extortionist" combo takes 11 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.

The end result: Infinite artifact ETB, Infinite artifact LTB, Infinite artifact sacrifice triggers, Infinite artifact tokens, Infinite colored mana, Infinite death triggers, Infinite energy counters, Infinite creature ETB, Infinite creature LTB, Infinite creature sacrifice triggers, Infinite storm count, Infinite Treasure tokens.

Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.

The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.

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