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

Color identity: GWU
Mana cost: {W}
Steps:
  1. Activate Ruin Ghost for {W}, exiling a land you control then returning it to the battlefield under your control.
  2. Lotus Cobra triggers, adding {W}.
  3. Retreat to Coralhelm triggers, untapping Ruin Ghost.
  4. Tap the land for mana.
  5. Repeat for infinite landfall.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite colorless mana
  - Infinite landfall triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Ruin Ghost does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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