How can you create a combo with Out of Time, Retraction Helix, Selvala, Heart of the Wilds?
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[START OF COMBO]This combo can be formed with Out of Time, Retraction Helix, Selvala, Heart of the Wilds

Color identity: GWU
Mana cost: {1}{G}{W}{W}{U}
Steps:
  1. Cast Retraction Helix by paying {U}, targeting any other creature you control without summoning sickness.
  2. Cast Out of Time by paying {1}{W}{W}.
  3. When Out of Time enters the battlefield, it triggers.
  4. Holding priority, activate Selvala by paying {G} and tapping it, adding at least {2}{G}{W}{W}.
  5. Activate the creature targeted by Retraction Helix by tapping it, returning Out of Time from the battlefield to your hand.
  6. Resolve the Out of Time trigger, untapping all creatures.
  7. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite mana creatures you control can produce
  - Infinite storm count
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Out of Time must be in your hand
  - Retraction Helix must be in your hand
  - Selvala, Heart of the Wilds must be on the battlefield
  - Selvala does not have summoning sickness.You control at least one additional creature without summoning sickness.
  - You control a creature with power five or greater.
[END OF COMBO PREREQUISITES]
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