How can you create a combo with Gonti's Aether Heart, Vesuvan Duplimancy, Clockspinning?
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[START OF COMBO]This combo can be formed with Gonti's Aether Heart, Vesuvan Duplimancy, Clockspinning

Color identity: U
Mana cost: {6}{U}{U} (at most) each turn
Steps:
  1. Cast Clockspinning with buyback by paying {3}{U}, targeting Gonti's Aether Heart.
  2. Vesuvan Duplimancy triggers, creating a token copy of Gonti's Aether Heart that isn't legendary.
  3. When the token Gonti's Aether Heart enters the battlefield, each Gonti's Aether Heart you control triggers, causing you to get {E}{E} for each Gonti's Aether Heart you control.
  4. Resolve Clockspinning, returning it to your hand.
  5. If you have less than eight {E}, repeat from step 1 one additional time.
  6. Activate a Gonti's Aether Heart token by paying eight {E} and exiling it, causing you to take an extra turn after this one.
  7. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Gonti's Aether Heart must be on the battlefield
  - Vesuvan Duplimancy must be on the battlefield
  - Clockspinning must be in your hand
[END OF COMBO PREREQUISITES]
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