How can you create a combo with Enduring Renewal, Phyrexian Altar, Intruder Alarm?
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[START OF COMBO]This combo can be formed with Enduring Renewal, Phyrexian Altar, Intruder Alarm

Color identity: WU
Mana cost: 
Steps:
  1. Activate all mana-producing creatures you control by tapping them, adding at least {1}.
  2. Cast the creature card by paying its mana cost.
  3. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  4. Activate Phyrexian Altar by sacrificing the creature, adding one mana of any color.
  5. When the creature dies, Enduring Renewal triggers, returning the creature to your hand from your graveyard.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least one creature card in hand.
  - Creatures you control can tap to produce enough mana to cast the creature card minus one colored mana.
  - You are able to cast the creature card in hand.
[END OF COMBO PREREQUISITES]
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