How can you create a combo with Metamorphic Alteration, Mirror-Mad Phantasm, Thassa's Oracle?
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[START OF COMBO]This combo can be formed with Metamorphic Alteration, Mirror-Mad Phantasm, Thassa's Oracle

Color identity: U
Mana cost: {2}{U}{U}{U}{U}
Steps:
  1. Cast Metamorphic Alteration by paying {1}{U}.
  2. Metamorphic Alteration enters the battlefield, causing it to become a copy of Mirror-Mad Phantasm.
  3. Activate Metamorphic Alteration using Mirror-Mad Phantasm's ability by paying {1}{U}, causing you to shuffle Metamorphic Alteration into your library and mill all cards from your library.
  4. Cast Thassa's Oracle by paying {U}{U}.
  5. Thassa's Oracle enters the battlefield, causing you to win the game.[END OF COMBO STEPS]

Result:
  - Win the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Metamorphic Alteration must be in your hand
  - Mirror-Mad Phantasm must be on the battlefield
  - Thassa's Oracle must be in your hand
[END OF COMBO PREREQUISITES]
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