How can you create a combo with Aether Vial, Cloudstone Curio, Pestermite, Deceiver Exarch?
user
[START OF COMBO]This combo can be formed with Aether Vial, Cloudstone Curio, Pestermite, Deceiver Exarch

Color identity: U
Mana cost: 
Steps:
  1. Activate Aether Vial by tapping it, putting Pestermite onto the battlefield from your hand.
  2. When Pestermite enters the battlefield, it and Cloudstone Curio trigger.
  3. Resolve the Pestermite trigger, untapping Aether Vial.
  4. Resolve the Cloudstone Curio trigger, returning Deceiver Exarch from the battlefield to your hand.
  5. Activate Aether Vial by tapping it, putting Deceiver Exarch onto the battlefield from your hand.
  6. When Deceiver Exarch enters the battlefield, it and Cloudstone Curio trigger.
  7. Resolve the Deceiver Exarch trigger, untapping Aether Vial.
  8. Resolve the Cloudstone Curio trigger, returning Pestermite from the battlefield to your hand.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Aether Vial must be on the battlefield
  - Cloudstone Curio must be on the battlefield
  - Pestermite must be in your hand
  - Deceiver Exarch must be on the battlefield
  - Aether Vial has exactly three charge counters on it.
[END OF COMBO PREREQUISITES]
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