How can you create a combo with Timesifter, Draco, Isochron Scepter, Pull from Eternity, Academy Ruins?
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[START OF COMBO]This combo can be formed with Timesifter, Draco, Isochron Scepter, Pull from Eternity, Academy Ruins

Color identity: WU
Mana cost: {3}{U} each turn
Steps:
  1. Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
  2. Resolve the copy of Pull from Eternity, putting Draco into your graveyard from exile.
  3. Activate Academy Ruins' second ability by paying {1}{U} and tapping it, putting Draco on top of your library from your graveyard.
  4. Move to the next turn.
  5. At the beginning of that turn's upkeep, Timesifter triggers, exiling the top card of each player's library, and causing you to take an extra turn after this one due to exiling the highest mana value card.
  6. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Timesifter must be on the battlefield
  - Draco must be exiled
  - Isochron Scepter must be on the battlefield
  - Pull from Eternity must be exiled
  - Academy Ruins must be on the battlefield
[END OF COMBO PREREQUISITES]
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