How can you create a combo with Admiral Brass, Unsinkable, Cellar Door, Timestream Navigator?
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[START OF COMBO]This combo can be formed with Admiral Brass, Unsinkable, Cellar Door, Timestream Navigator

Color identity: UBR
Mana cost: {5}{U}{U} each turn
Steps:
  1. At the beginning of your combat phase, Admiral Brass triggers, returning Timestream Navigator from your graveyard to the battlefield with a finality counter on it, and giving it haste.
  2. If you don't have the city's blessing, Timestream Navigator gives you the city's blessing.
  3. Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library from the battlefield, causing you to take an extra turn after this one.
  4. Activate Cellar Door by paying {3} and tapping it, searching your library for Timestream Navigator, putting it into your graveyard and creating a 2/2 Zombie creature token.
  5. Repeat each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Admiral Brass, Unsinkable must be on the battlefield
  - Cellar Door must be on the battlefield
  - Timestream Navigator must be in the graveyard
  - You have the city's blessing and/or control at least nine permanents.
[END OF COMBO PREREQUISITES]
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