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

Color identity: BG
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:
  - Zask, Skittering Swarmlord must be on the battlefield
  - Azusa, Lost but Seeking must be on the battlefield
  - Glacial Chasm must be in your hand or in the graveyard
  - You control at least one additional land.
[END OF COMBO PREREQUISITES]
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