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

Color identity: U
Mana cost: {U}
Steps:
  1. Cast Banishing Knack by paying {U}, targeting any non-mana producing creature you control that does not have summoning sickness.
  2. Activate all mana-producing creatures you control by tapping them, adding at least {1}.
  3. Cast the creature from your hand by paying its mana cost.
  4. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Activate the creature targeted by Banishing Knack by tapping it, returning the creature cast in step 3 to your hand from the battlefield.
  6. Repeat from step 2.[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
  - Banishing Knack must be in your hand
  - You have a creature card in hand.
  - Creatures you control can tap to produce enough mana to cast the creature card.
  - You control at least one additional non-mana producing creature that does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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