How can you create a combo with Norn's Choirmaster, Crystalline Crawler, Cryptic Trilobite, Deadeye Navigator?
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[START OF COMBO]This combo can be formed with Norn's Choirmaster, Crystalline Crawler, Cryptic Trilobite, Deadeye Navigator

Color identity: WU
Mana cost: {1}{U}
Steps:
  1. Activate your commander by paying {1}{U}, blinking it.
  2. Your commander enters the battlefield, triggering Deadeye Navigator's soulbond ability and Norn's Choirmaster.
  3. Resolve the Deadeye Navigator, repairing it and your commander.
  4. Resolve the Norn's Choirmaster trigger, putting a +1/+1 counter on Cryptic Trilobite and Crystalline Crawler.
  5. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {U}.
  6. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Cryptic Trilobite
  - Infinite colorless mana that can only be spent to activate abilities
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite proliferate[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Your commander on the battlefield.
  - Crystalline Crawler and Cryptic Trilobite have at least one +1/1 counter on them.
  - Deadeye Navigator is paired with your commander.
[END OF COMBO PREREQUISITES]
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