Mirror-Mad Phantasm, and Machine God's Effigy

Prerequisites

• Mirror-Mad Phantasm on the battlefield
• Machine God's Effigy in hand
• available

Steps

1. Cast Machine God's Effigy by paying
2. Choose to have it enter the battlefield as a copy of Mirror-Mad Phantasm, except it is an artifact and not a creature
3. Activate Machine God's Effigy by tapping it, adding
4. Activate Machine God's Effigy by paying , shuffling it into your library and then milling your entire library due to there not being a card named Mirror-Mad Phantasm in it

Results

• Infinite self-mill