How can you create a combo with Gyruda, Doom of Depths, Mortuary, Clever Impersonator?
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[START OF COMBO]This combo can be formed with Gyruda, Doom of Depths, Mortuary, Clever Impersonator

Color identity: UB
Mana cost: {2}{U}{U}
Steps:
  1. Cast Clever Impersonator by paying {2}{U}{U}, having it enter the battlefield as a copy of Gyruda.
  2. Put Clever Impersonator into your graveyard due to the legend rule.
  3. Mortuary triggers, putting Clever Impersonator on top of your library from your graveyard.
  4. Clever Impersonator's enter the battlefield ability triggers, causing each player to mill four cards and you to return Clever Impersonator from your graveyard to the battlefield as a copy of Gyruda.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Gyruda, Doom of Depths must be on the battlefield
  - Mortuary must be on the battlefield
  - Clever Impersonator must be in your hand
[END OF COMBO PREREQUISITES]
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