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

Color identity: WU
Mana cost: 
Steps:
  1. Activate any basic Plains you control by tapping it, adding {W}.
  2. Activate Ruin Ghost by paying {W} and tapping it, blinking the Plains.
  3. The Plains enters the battlefield, triggering Retreat to Coralhelm, untapping Ruin Ghost.
  4. Repeat.[END OF COMBO STEPS]

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

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