How can you create a combo with Orvar, the All-Form, Spark Double, Whim of Volrath?
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[START OF COMBO]This combo can be formed with Orvar, the All-Form, Spark Double, Whim of Volrath

Color identity: U
Mana cost: {4}{U}{U}
Steps:
  1. Cast Whim of Volrath with buyback by paying {2}{U}, targeting Spark Double.
  2. Orvar triggers, creating a token copy of Spark Double that enters the battlefield as a nonlegendary token copy of Orvar.
  3. Resolve Whim of Volrath, returning it to your hand.
  4. Cast Whim of Volrath with buyback by paying {2}{U}, targeting any Island that enters the battlefield untapped.
  5. Orvar, Spark Double and the Spark Double token trigger, creating three token copies of the Island.
  6. Resolve Whim of Volrath, returning it to your hand.
  7. Activate the Island tokens by tapping them, adding {U}{U}{U}.
  8. Repeat from step 4.
  9. Optionally, you may repeat steps 1 through 3 one additional time to get infinite untapped Island tokens and blue mana.
  10. If you choose to get infinite mana, you can then target any permanent using Whim of Volrath to get infinite tokens of them.[END OF COMBO STEPS]

Result:
  - Infinite copies of permanents you control
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite landfall triggers
  - Infinite magecraft triggers
  - Infinite mana lands you control can produce
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Orvar, the All-Form must be on the battlefield
  - Spark Double must be on the battlefield
  - Whim of Volrath must be in your hand
  - You control an Island that enters the battlefield untapped.
[END OF COMBO PREREQUISITES]
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