How can you create a combo with Duskmantle Guildmage, Maddening Cacophony?
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[START OF COMBO]This combo can be formed with Duskmantle Guildmage, Maddening Cacophony

Color identity: UB
Mana cost: {5}{U}{U}{U}{B}
Steps:
  1. Activate Duskmantle Guildmage's first ability by paying {1}{U}{B}.
  2. Cast Maddening Cacophony with kicker by paying {4}{U}{U}, causing each opponent to mill half their library, rounded up.
  3. Duskmantle Guildmage triggers for each card milled this way.
  4. Resolve the first Duskmantle Guildmage trigger, causing the opponent to lose 1 life.
  5. Repeat step 4 until the opponent loses the game due to having zero or less life.
  6. Repeat from step 4 for each remaining trigger.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game
  - Near-infinite lifeloss
  - Near-infinite mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Duskmantle Guildmage must be on the battlefield
  - Maddening Cacophony must be in your hand
  - Each opponent has a life total that is less than or equal to half their library size, rounded up.
[END OF COMBO PREREQUISITES]
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