How can you create a combo with Intruder Alarm, Aethersnipe?
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[START OF COMBO]This combo can be formed with Intruder Alarm, Aethersnipe

Color identity: U
Mana cost: 
Steps:
  1. Activate mana-producing creatures you control by tapping them, adding at least {2}{U}{U}.
  2. Cast Aethersnipe for its evoke cost by paying {1}{U}{U}.
  3. When Aethersnipe enters the battlefield, both of its abilities trigger and Intruder Alarm triggers; put the evoke trigger on the stack first.
  4. Resolve the Intruder Alarm trigger, untapping all creatures.
  5. Resolve Aethersnipe's first ability, returning it from the battlefield to your hand.
  6. Resolve Aethersnipe's evoke trigger, failing to sacrifice it since it is not on the battlefield.
  7. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Intruder Alarm must be on the battlefield
  - Aethersnipe must be in your hand
  - You control creatures that can tap to produce at least {2}{U}{U}.
[END OF COMBO PREREQUISITES]
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