How can you create a combo with Arthur, Marigold Knight, Medomai the Ageless, Scroll Rack?
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[START OF COMBO]This combo can be formed with Arthur, Marigold Knight, Medomai the Ageless, Scroll Rack

Color identity: URW
Mana cost: {1} each turn
Steps:
  1. Activate Scroll Rack by paying {1} and tapping it, causing you to exile Medomai the Ageless from your hand and put the top card of your library into your hand, then put Medomai the Ageless from exile on top of your library.
  2. Declare Arthur and at least one other creature as attackers.
  3. Arthur triggers, causing you to reveal the top six cards of your library and put Medomai the Ageless onto the battlefield tapped and attacking.
  4. Deal combat damage using Medomai the Ageless.
  5. Medomai the Ageless triggers, causing you to take an extra turn after this one.
  6. At the end of your combat phase, Arthur triggers, returning Medomai the Ageless from the battlefield to your hand.
  7. Repeat each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Arthur, Marigold Knight must be on the battlefield
  - Medomai the Ageless must be in your hand
  - Scroll Rack must be on the battlefield
  - You control at least one other creature that does not have summoning sickness.
  - An opponent cannot block creatures you control.
[END OF COMBO PREREQUISITES]
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