How can you create a combo with Retreat to Coralhelm, Storm Cauldron, Murasa Rootgrazer?
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[START OF COMBO]This combo can be formed with Retreat to Coralhelm, Storm Cauldron, Murasa Rootgrazer

Color identity: GWU
Mana cost: 
Steps:
  1. Activate Murasa Rootgrazer's first ability by tapping it, putting a basic land from your hand onto the battlefield.
  2. The land enters the battlefield, triggering Retreat to Coralhelm, untapping Murasa Rootgrazer.
  3. Activate the basic land by tapping it, adding {1}.
  4. Storm Cauldron triggers, returning the basic land from your battlefield to your hand.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite landfall triggers
  - Infinite mana basic lands you control can produce[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have a basic land in hand.
  - Murasa Rootgrazer does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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