How can you create a combo with Orvar, the All-Form, Clockspinning, Dockside Extortionist?
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[START OF COMBO]This combo can be formed with Orvar, the All-Form, Clockspinning, Dockside Extortionist

Color identity: UR
Mana cost: {3}{U}
Steps:
  1. Cast Clockspinning with buyback by paying {3}{U}, targeting Dockside Extortionist.
  2. Orvar's first ability triggers, creating a token copy of Dockside Extortionist.
  3. The token Dockside Extortionist enters the battlefield, creating at least five Treasure tokens.
  4. Resolve Clockspinning, changing nothing and returning it to your hand.
  5. Activate four Treasure tokens by tapping and sacrificing them, adding {3}{U}.
  6. Repeat.
  7. Once you have infinite mana, you can target any permanents you control in step 1 to create infinite token copies of them.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite copies of permanents you control
  - Infinite magecraft triggers
  - Infinite storm count
  - Infinite Treasure tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Orvar, the All-Form must be on the battlefield
  - Clockspinning must be in your hand
  - Dockside Extortionist must be on the battlefield
  - Opponents control at least five artifacts and/or enchantments.
[END OF COMBO PREREQUISITES]
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