How can you create a combo with Cloud of Faeries, Coffin Queen, Intruder Alarm, Phyrexian Tower?
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[START OF COMBO]This combo can be formed with Cloud of Faeries, Coffin Queen, Intruder Alarm, Phyrexian Tower

Color identity: UB
Mana cost: {B}
Steps:
  1. Put Faeries into a graveyard if not already there by casting and/or sacrificing them.
  2. Activate Coffin Queen targeting Faeries.
  3. When Faeries enter the battlefield, stack the triggers to untap lands first, then untap Coffin Queen and sacrifice Faeries to Tower while Queen's exile trigger is on the stack.
  4. Repeat from Step 2.
  5. If a land you control (other than Tower) taps for more than one mana, make infinite mana.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite untap of all creatures (including opponents')[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Cloud of Faeries must be in the graveyard
  - Coffin Queen must be on the battlefield
  - Intruder Alarm must be on the battlefield
  - Phyrexian Tower must be on the battlefield
  - Coffin Queen does not have summoning sickness.
  - {2}
[END OF COMBO PREREQUISITES]
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