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

Color identity: GWU
Mana cost: 
Steps:
  1. Activate Murasa Rootgrazer's first ability, putting a basic land from your hand onto the battlefield.
  2. The Retreat to Coralhelms trigger.
  3. In response, activate the basic land by tapping it, adding {1}.
  4. Let the first Retreat to Coralhelm trigger resolve, untapping Murasa Rootgrazer.
  5. Activate Murasa Rootgrazer's last ability, returning any basic land you control from the battlefield to your hand.
  6. Let the second Retreat trigger resolve, untapping Murasa Rootgrazer.
  7. 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
  - At least one basic land in hand.
  - Mirrormade is a copy of Retreat to Coralhelm.
  - Murasa Rootgrazer does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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