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

Color identity: GU
Mana cost: 
Steps:
  1. Activate Llanowar Scout by tapping it, putting Ghost Town from your hand onto the battlefield.
  2. Retreat to Coralhelm triggers, untapping Llanowar Scout.
  3. Activate Ghost Town by tapping it, adding {C}.
  4. Activate Ghost town by paying {0}, returning it to your hand.
  5. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Retreat to Coralhelm must be on the battlefield
  - Llanowar Scout must be on the battlefield
  - Ghost Town must be in your hand
  - Llanowar Scout does not have summoning sickness.
  - It is not your turn.
[END OF COMBO PREREQUISITES]
assistant