Mirror-Mad Phantasm, and Dack's Duplicate

Prerequisites

• Mirror-Mad Phantasm in hand or on the battlefield or in the command zone or in exile or in the graveyard
• Dack's Duplicate on the battlefield
• Dack's Duplicate is a copy of Mirror-Mad Phantasm
• available

Steps

1. Activate Dack's Duplicate by paying , shuffling Dack's Duplicate 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