How can you create a combo with Harbinger of the Seas, Choke?
user
[START OF COMBO]This combo can be formed with Harbinger of the Seas, Choke

Color identity: GU
Mana cost: 
Steps:
  1. Because Harbinger of the Seas causes all nonbasic lands to be Islands, and Choke prevents Islands from untapping during their controller's untap steps, nonbasic lands do not untap during their controller's untap steps.[END OF COMBO STEPS]

Result:
  - Nonbasic lands do not untap during their controller's untap steps[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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