Mirror-Mad Phantasm, and Progenitor Mimic

Prerequisites

• Mirror-Mad Phantasm in hand or on the battlefield or in the command zone or in exile or in the graveyard
• Progenitor Mimic on the battlefield
• Progenitor Mimic is a copy of Mirror-Mad Phantasm
• available

Steps

1. Activate Progenitor Mimic by paying , shuffling Progenitor Mimic 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