How can you create a combo with Astral Dragon, Flameshadow Conjuring, Primal Vigor?
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[START OF COMBO]This combo can be formed with Astral Dragon, Flameshadow Conjuring, Primal Vigor

Color identity: GUR
Mana cost: {6}{U}{U}{R}
Steps:
  1. Cast Astral Dragon by paying {6}{U}{U}.
  2. When Astral Dragon enters the battlefield, it and Flameshadow Conjuring trigger.
  3. Resolve the Astral Dragon trigger, creating four token copies of Primal Vigor that are 3/3 Dragon creatures in addition to their other types.
  4. Resolve the Flameshadow Conjuring trigger, causing you to pay {R} to create a total of 32 Astral Dragon tokens with haste.
  5. When the Astral Dragon tokens enter the battlefield, they trigger, creating an extremely large number of Primal Vigor tokens that are 3/3 Dragon creatures in addition to their other types.[END OF COMBO STEPS]

Result:
  - Near-infinite creature tokens
  - Near-infinite enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Astral Dragon must be in your hand
  - Flameshadow Conjuring must be on the battlefield
  - Primal Vigor must be on the battlefield
[END OF COMBO PREREQUISITES]
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