How can you create a combo with Archmage of Echoes, Quickling, Cloud of Faeries, Faerie Impostor?
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[START OF COMBO]This combo can be formed with Archmage of Echoes, Quickling, Cloud of Faeries, Faerie Impostor

Color identity: U
Mana cost: 
Steps:
  1. Activate up to two lands by tapping them, adding at least {1}{U}.
  2. Cast Cloud of Faeries by paying {1}{U}.
  3. Archmage of Echoes triggers, copying Cloud of Faeries.
  4. Resolve the copy of the Cloud of Faeries spell, creating a token copy of it.
  5. When the Cloud of Faeries token enters the battlefield, it triggers, untapping up to two lands.
  6. Activate up to two lands by tapping them, adding at least {1}{U}.
  7. Resolve the original Cloud of Faeries spell.
  8. When Cloud of Faeries enters the battlefield, it triggers, untapping up to two lands.
  9. Cast either Quickling or Faerie Impostor from your hand by paying its mana cost.
  10. Archmage of Echoes triggers, copying the Quickling or Faerie Impostor spell.
  11. Resolve the copy of the Quickling or Faerie Impostor spell, creating a token copy of it.
  12. When the Quickling or Faerie Impostor token enters the battlefield, it triggers, returning Quickling or Faerie Impostor from the battlefield to your hand.
  13. Resolve the original Quickling or Faerie Impostor spell.
  14. When Quickling or Faerie Impostor enters the battlefield, it triggers, returning Cloud of Faeries from the battlefield to your hand.
  15. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite storm count
  - Infinite creature tokens
  - Infinite mana lands you control can produce
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Archmage of Echoes must be on the battlefield
  - Quickling must be in your hand or on the battlefield
  - Cloud of Faeries must be in your hand
  - Faerie Impostor must be in your hand or on the battlefield
  - You control up to two lands that can tap to produce at least {1}{U}.
  - Either Quickling or Faerie Impostor must be in your hand, with the other on the battlefield.
[END OF COMBO PREREQUISITES]
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