How can you create a combo with Izzet Guildmage, Dramatic Reversal?
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[START OF COMBO]This combo can be formed with Izzet Guildmage, Dramatic Reversal

Color identity: UR
Mana cost: {3}{U}{U}
Steps:
  1. Cast Dramatic Reversal by paying {1}{U}.
  2. Holding priority, activate Izzet Guildmage's first ability by paying {2}{U}, copying Dramatic Reversal.
  3. Resolve the Dramatic Reversal copy, untapping all nonland permanents you control.
  4. Activate all nonland permanents by tapping those, adding at least {3}{U}.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite colored mana[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Izzet Guildmage must be on the battlefield
  - Dramatic Reversal must be in your hand
  - You control nonland permanents that can tap to produce at least {3}{U}.
[END OF COMBO PREREQUISITES]
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