the front side of Mirror-Mad Phantasm
the back of a classic MtG card
the front side of Unstable Shapeshifter
the back of a classic MtG card

Color Identity: U

Initial Card State

  1.  Mirror-Mad Phantasm in hand.
  2.  Unstable Shapeshifter on the battlefield.

Mana Needed

  1. four generic manaone blue manaone blue manaone blue mana available.

Steps

  1. Cast Mirror-Mad Phantasm by paying three generic manaone blue manaone blue mana.
  2. When Mirror-Mad Phantasm enters the battlefield, Unstable Shapeshifter triggers, causing Unstable Shapeshifter to become a copy of Mirror-Mad Phantasm until end of turn.
  3. Activate Unstable Shapeshifter by paying one generic manaone blue mana, shuffling Unstable Shapeshifter into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.

Results

  1. Infinite self-mill.
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