Mirror-Mad Phantasm + Unstable Shapeshifter
Produces: Infinite self-mill
- Mirror-Mad Phantasm
- Unstable Shapeshifter
- Color identity
- U
- Mana
- {4}{U}{U}{U}
Steps
- Cast Mirror-Mad Phantasm by paying {3}{U}{U}.
- 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.
- Activate Unstable Shapeshifter by paying {1}{U}, shuffling Unstable Shapeshifter into your library and milling your entire library due to it not having a card named Mirror-Mad Phantasm in it.
How to execute this combo
The "Mirror-Mad Phantasm + Unstable Shapeshifter" combo takes 3 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite self-mill.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.