How can you create a combo with Chief Engineer, Ancestral Statue, Intruder Alarm?
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[START OF COMBO]This combo can be formed with Chief Engineer, Ancestral Statue, Intruder Alarm

Color identity: U
Mana cost: 
Steps:
  1. Cast Ancestral Statue by tapping four creatures you control.
  2. When Ancestral Statue enters the battlefield, it and Intruder Alarm trigger.
  3. Resolve the Intruder Alarm trigger, untapping all creatures.
  4. Resolve the Ancestral Statue trigger, returning it from the battlefield to your hand.
  5. 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:
  - Chief Engineer must be on the battlefield
  - Ancestral Statue must be in your hand
  - Intruder Alarm must be on the battlefield
  - You control at least four creatures.
[END OF COMBO PREREQUISITES]
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