How can you create a combo with Kiki-Jiki, Mirror Breaker, Dockside Extortionist, Crab Umbra?
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[START OF COMBO]This combo can be formed with Kiki-Jiki, Mirror Breaker, Dockside Extortionist, Crab Umbra

Color identity: UR
Mana cost: 
Steps:
  1. Activate Kiki-Jiki by tapping it, creating a token copy of Dockside Extortionist with haste.
  2. When the token enters the battlefield, it triggers, creating at least four Treasures.
  3. Activate three Treasures by tapping and sacrificing them, adding {2}{U}.
  4. Activate Crab Umbra by paying {2}{U}, untapping Kiki-Jiki.
  5. Repeat.
  6. Once you have infinite Treasures, you may instead create token copies of any other nonlegendary creature you control.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite copies of nonlegendary creatures you control with haste
  - Infinite creature tokens with haste
  - Infinite enters the battlefield
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Crab Umbra attached to Kiki-Jiki.
  - Opponents control at least four artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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