How can you create a combo with Progenitor Mimic, Capture of Jingzhou, Returned Pastcaller?
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[START OF COMBO]This combo can be formed with Progenitor Mimic, Capture of Jingzhou, Returned Pastcaller

Color identity: RGWU
Mana cost: 
Steps:
  1. Cast Capture of Jingzhou by paying its mana cost, taking an extra turn after this one.
  2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Returned Pastcaller.
  3. When the token Returned Pastcaller enters the battlefield, it triggers itself, returning Capture of Jingzhou from your graveyard to your hand.
  4. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Enough mana available to cast the extra turn spell each turn.
  - Progenitor Mimic is a copy of Returned Pastcaller.
[END OF COMBO PREREQUISITES]
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