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

Color identity: WUBR
Mana cost: {4}{B}
Steps:
  1. Cast Priest of Gix by paying {2}{B}, plus an additional {2} for its offspring cost.
  2. When Priest of Gix 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 Gix trigger, adding {B}{B}{B}.
  5. Resolve the second Priest of Gix trigger, creating a token copy of it that is 1/1.
  6. When the Priest of Gix token enters the battlefield, it and Cloudstone Curio trigger.
  7. Resolve the Cloudstone Curio trigger, returning the nontoken Priest of Gix from the battlefield to your hand.
  8. Resolve the Priest of Gix token's trigger, adding {B}{B}{B}.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite storm count
  - Infinite creature tokens
  - Infinite black mana
  - 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 Gix must be in your hand
[END OF COMBO PREREQUISITES]
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