How can you create a combo with Glacial Chasm, Azusa, Lost but Seeking, Ramunap Excavator?
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[START OF COMBO]This combo can be formed with Glacial Chasm, Azusa, Lost but Seeking, Ramunap Excavator

Color identity: G
Mana cost: 
Steps:
  1. Play Glacial Chasm either from your hand or from your graveyard.
  2. When Glacial Chasm enters the battlefield, its second ability triggers, causing you to sacrifice another land you control.
  3. Pass the turn.
  4. At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers, causing you to sacrifice it.
  5. Play a land except Glacial Chasm from your graveyard.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Prevent all damage that would be dealt to you[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Glacial Chasm must be in your hand or in the graveyard
  - Azusa, Lost but Seeking must be on the battlefield
  - Ramunap Excavator must be on the battlefield
  - You control at least one additional land.
[END OF COMBO PREREQUISITES]
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