Mirror-Mad Phantasm, and Renegade Doppelganger

Prerequisites

• Mirror-Mad Phantasm in hand
• Renegade Doppelganger on the battlefield
• available

Steps

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

Results

• Infinite self-mill