How can you create a combo with Necroduality, Rooftop Storm, Cloudstone Curio?
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[START OF COMBO]This combo can be formed with Necroduality, Rooftop Storm, Cloudstone Curio

Color identity: U
Mana cost: 
Steps:
  1. Cast a nonlegendary, nonartifact Zombie by paying {0}.
  2. The Zombie enters the battlefield, triggering Cloudstone Curio and Necroduality.
  3. Resolve the Cloudstone Curio trigger, returning nothing to your hand.
  4. Resolve the Necroduality trigger, creating a token copy of the Zombie.
  5. Cloudstone Curio triggers, returning the nontoken Zombie to your hand.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You have a nonlegendary, nonartifact Zombie card in hand.
[END OF COMBO PREREQUISITES]
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