How can you create a combo with Uyo, Silent Prophet, Walking Atlas, Retreat to Coralhelm?
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[START OF COMBO]This combo can be formed with Uyo, Silent Prophet, Walking Atlas, Retreat to Coralhelm

Color identity: U
Mana cost: {2}, plus enough mana to cast the instant or sorcery
Steps:
  1. Cast any instant or sorcery by paying its mana cost.
  2. In response, activate Uyo by paying {2} and returning two lands you control from the battlefield to your hand, copying an instant or sorcery spell.
  3. Activate Walking Atlas by tapping it, putting a land from your hand onto the battlefield.
  4. When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Walking Atlast.
  5. Repeat steps 3 and 4 one additional time.
  6. Activate those lands by tapping them, adding at least {2}.
  7. Repeat from step 2 any number of times.
  8. Resolve any number of copies created in step 2 and the original spell.[END OF COMBO STEPS]

Result:
  - Infinite copies of instant and sorcery spells on the stack
  - Infinite landfall
  - Infinite magecraft triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Any additional instant or sorcery card in hand.
  - You control two lands that enter the battlefield untapped and produce mana.
  - Walking Atlas does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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