How can you create a combo with Zinnia, Valley's Voice, Cloudstone Curio, Priest of Urabrask?
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[START OF COMBO]This combo can be formed with Zinnia, Valley's Voice, Cloudstone Curio, Priest of Urabrask

Color identity: URW
Mana cost: {4}{R}
Steps:
  1. Cast Priest of Urabrask by paying {2}{R}, plus an additional {2} for its offspring cost.
  2. When Priest of Urabrask enters the battlefield, it triggers twice and Cloudstone Curio triggers once.
  3. Resolve the Cloudstone Curio trigger, returning nothing to your hand.
  4. Resolve the first Priest of Urabrask trigger, adding {R}{R}{R}.
  5. Resolve the second Priest of Urabrask trigger, creating a token copy of it that is 1/1.
  6. When the Priest of Urabrask token enters the battlefield, it and Cloudstone Curio trigger.
  7. Resolve the Cloudstone Curio trigger, returning the nontoken Priest of Urabrask from the battlefield to your hand.
  8. Resolve the Priest of Urabrask token's trigger, adding {R}{R}{R}.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite storm count
  - Infinite red mana
  - Infinite creature tokens
  - Infinitely powerful Zinnia[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Zinnia, Valley's Voice must be on the battlefield
  - Cloudstone Curio must be on the battlefield
  - Priest of Urabrask must be in your hand
[END OF COMBO PREREQUISITES]
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