How can you create a combo with Midnight Guard, Retraction Helix, Dockside Extortionist?
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[START OF COMBO]This combo can be formed with Midnight Guard, Retraction Helix, Dockside Extortionist

Color identity: URW
Mana cost: {1}{R}
Steps:
  1. Cast Dockside Extortionist by paying {1}{R}.
  2. Dockside Extortionist enters the battlefield, triggering itself and Midnight Guard.
  3. Resolve the Dockside Extortionist trigger, creating at least three Treasure tokens.
  4. Resolve the Midnight Guard trigger, untapping it.
  5. Activate three Treasure tokens by tapping and sacrificing them, adding {1}{U}{R}.
  6. Cast Retraction Helix by paying {U}, targeting Midnight Guard.
  7. Activate Midnight Guard by tapping it, returning Dockside Extortionist from the battlefield to your hand.
  8. Cast Dockside Extortionist by paying {1}{R}.
  9. Dockside Extortionist enters the battlefield, triggering itself and Midnight Guard.
  10. Resolve the Dockside Extortionist trigger, creating at least three Treasure tokens.
  11. Resolve the Midnight Guard trigger, untapping it.
  12. Activate two Treasure tokens by tapping and sacrificing them, adding {1}{R}.
  13. Repeat from step 7.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Midnight Guard must be on the battlefield
  - Retraction Helix must be in your hand
  - Dockside Extortionist must be in your hand
  - Midnight Guard does not have summoning sickness.
  - Opponents control at least three artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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