How can you create a combo with Ruin Ghost, Retreat to Coralhelm, Akoum Hellkite?
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[START OF COMBO]This combo can be formed with Ruin Ghost, Retreat to Coralhelm, Akoum Hellkite

Color identity: URW
Mana cost: 
Steps:
  1. Tap the land to generate a white mana.
  2. Activate Ruin Ghost to exile the land and return it to the battlefield.
  3. Untap Ruin Ghost using the landfall trigger from Retreat to Coralhelm.
  4. Deal 1 damage to an opponent using Akoum Hellkite.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite damage
  - Infinite landfall triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - A land that enters untapped and can tap for {W}.
[END OF COMBO PREREQUISITES]
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