How can you create a combo with Kurkesh, Onakke Ancient, Lithoform Engine, Voltaic Key, Dockside Extortionist?
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[START OF COMBO]This combo can be formed with Kurkesh, Onakke Ancient, Lithoform Engine, Voltaic Key, Dockside Extortionist

Color identity: R
Mana cost: 
Steps:
  1. Cast Dockside Extortionist for {1}{R}.
  2. If you want infinite creature tokens, skip to step 8; otherwise, continue to step 3.
  3. Dockside Extortionist ETBs, putting its ETB trigger onto the stack.
  4. Tap Lithoform Engine, copying the ETB and triggering Kurkesh.
  5. Pay {R} for the Kurkesh, copying the ETB an additional time.
  6. Resolve both copied ETBs, generating at least 6 treasures.
  7. Continue from step 11.
  8. While Dockside Extortionist is still on the stack, tap Lithoform Engine for {4} to copy Dockside Extortionist, triggering Kurkesh.
  9. Pay {R} for the Kurkesh trigger, copying Dockside Extortionist an additional time.
  10. Resolve both Dockside Extortionist copies, creating at least 8 treasure tokens.
  11. Tap Voltaic Key for 1 treasure token, untapping Lithoform Engine and triggering Kurkesh.
  12. Spend 1 treasure token to pay for the trigger, copying the untap ability targeting Voltaic Key.
  13. Repeat for infinite treasure tokens, and creature tokens if applicable.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens if applicable
  - Infinite enters the battlefield if applicable
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Kurkesh, Onakke Ancient must be on the battlefield
  - Lithoform Engine must be on the battlefield
  - Voltaic Key must be on the battlefield
  - Dockside Extortionist must be in your hand
  - For infinite mana, {3}{R}{R} is required, and your opponents must have at least 3 artifacts and/or enchantments.
  - For infinite creature tokens and mana, {5}{R}{R} is required, and your opponents must have at least 4 artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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