How can you create a combo with Astral Dragon, Biovisionary, Mirror of the Forebears?
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[START OF COMBO]This combo can be formed with Astral Dragon, Biovisionary, Mirror of the Forebears

Color identity: GU
Mana cost: {9}{U}{U}
Steps:
  1. Cast Astral Dragon by paying {6}{U}{U}.
  2. When Astral Dragon enters the battlefield, it triggers, creating two token copies of Mirror of the Forebears that are 3/3 Dragons in addition to their other types.
  3. Choose to name "Human" as the Mirror of the Forebears tokens enter the battlefield.
  4. Activate the three Mirror of the Forebears by paying {3}, causing each of them to become a copy of Biovisionary until end of turn.
  5. At the beginning of your end step, Biovisionary and each Mirror of the Forebears trigger.
  6. Resolve the first trigger, causing you to win the game.[END OF COMBO STEPS]

Result:
  - Win the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Astral Dragon must be in your hand
  - Biovisionary must be on the battlefield
  - Mirror of the Forebears must be on the battlefield
  - "Human" or "Wizard" chosen with Mirror of the Forebears.
[END OF COMBO PREREQUISITES]
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