How can you create a combo with Zinnia, Valley's Voice, Cloudstone Curio, Burning-Tree Emissary?
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[START OF COMBO]This combo can be formed with Zinnia, Valley's Voice, Cloudstone Curio, Burning-Tree Emissary

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

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite storm count
  - 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
  - Burning-Tree Emissary must be in your hand
[END OF COMBO PREREQUISITES]
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