How can you create a combo with Medomai the Ageless, Exchange of Words, Mistmeadow Vanisher?
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[START OF COMBO]This combo can be formed with Medomai the Ageless, Exchange of Words, Mistmeadow Vanisher

Color identity: WU
Mana cost: {1}{U}{U} the first turn
Steps:
  1. Cast Exchange of Words by paying {1}{U}{U}.
  2. When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of Medomai and Mistmeadow Vanisher until Exchange of Words leaves the battlefield.
  3. Declare Medomai as an attacker.
  4. Medomai triggers, exiling Exchange of Words until your end step.
  5. When Exchange of Words leaves the battlefield, Medomai and Mistmeadow Vanisher retain their original textboxes.
  6. Deal combat damage using Medomai.
  7. Medomai triggers, causing you to take an extra turn after this one.
  8. At the beginning of your end step, Medomai triggers, returning Exchange of Words to the battlefield from exile.
  9. When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of Medomai and Mistmeadow Vanisher until Exchange of Words leaves the battlefield.
  10. Repeat from step 3 each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Medomai the Ageless must be on the battlefield
  - Exchange of Words must be in your hand
  - Mistmeadow Vanisher must be on the battlefield
  - An opponent cannot block Medomai.
[END OF COMBO PREREQUISITES]
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