How can you create a combo with Primal Prayers, Guide of Souls, Cavern Harpy?
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[START OF COMBO]This combo can be formed with Primal Prayers, Guide of Souls, Cavern Harpy

Color identity: GWUB
Mana cost: 
Steps:
  1. Cast Cavern Harpy by paying {E} due to Primal Prayers, if able, or by paying its mana cost.
  2. When Cavern Harpy enters the battlefield, it and Guide of Souls trigger.
  3. Resolve the Guide of Souls trigger, causing you to get {E} and gain 1 life.
  4. Resolve the Cavern Harpy trigger, returning it from the battlefield to your hand.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite lifegain triggers
  - Infinite lifegain
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Primal Prayers must be on the battlefield
  - Guide of Souls must be on the battlefield
  - Cavern Harpy must be in your hand
  - You have at least {E} or enough mana to cast Cavern Harpy
[END OF COMBO PREREQUISITES]
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