How can you create a combo with Karador, Ghost Chieftain, Timestream Navigator, Cellar Door?
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[START OF COMBO]This combo can be formed with Karador, Ghost Chieftain, Timestream Navigator, Cellar Door

Color identity: GWUB
Mana cost: {6}{U}{U}{U} each turn
Steps:
  1. Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
  2. Activate Cellar Door by paying {3} and tapping it, causing you to put Timestream Navigator from the bottom of your library into your graveyard and create a 2/2 Zombie creature token.
  3. Cast Timestream Navigator from your graveyard by paying {1}{U}.
  4. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Timesteam Navigator does not have summoning sickness.
  - You have the city's blessing.
  - You have not cast a creature spell using Karador this turn.
[END OF COMBO PREREQUISITES]
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