How can you create a combo with Mirror-Mad Phantasm, Absorb Identity?
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[START OF COMBO]This combo can be formed with Mirror-Mad Phantasm, Absorb Identity

Color identity: U
Mana cost: {2}{U}{U}
Steps:
  1. Cast Absorb Identity by paying {1}{U}, returning Mirror-Mad Phantasm to your hand from the battlefield, and causing each Shapeshifter you control to become a copy of Mirror-Mad Phantasm until end of turn.
  2. Activate a Shapeshifter by paying {1}{U}, shuffling it into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.[END OF COMBO STEPS]

Result:
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Mirror-Mad Phantasm must be on the battlefield
  - Absorb Identity must be in your hand
  - You control at least one Shapeshifter.
[END OF COMBO PREREQUISITES]
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