How can you create a combo with Paradox Engine, Memnite, Retraction Helix, Sol Ring?
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[START OF COMBO]This combo can be formed with Paradox Engine, Memnite, Retraction Helix, Sol Ring

Color identity: U
Mana cost: {U}
Steps:
  1. Cast Retraction Helix targeting Memnite Tap Sol Ring for {C} {C} Use Memnite's new ability to bounce Sol Ring to hand.
  2. Cast Sol Ring triggering Paradox Engine untapping all nonland permanents.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite enters the battlefield
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Paradox Engine must be on the battlefield
  - Memnite must be on the battlefield
  - Retraction Helix must be in your hand
  - Sol Ring must be on the battlefield
[END OF COMBO PREREQUISITES]
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