Lazav, the Multifarious, Mirror-Mad Phantasm, and Thassa's Oracle

Prerequisites

• Lazav, the Multifarious on the battlefield
• Mirror-Mad Phantasm in the graveyard
• Thassa's Oracle in hand
• available

Steps

1. Activate Lazav by paying , causing it to become a copy of Mirror-Mad Phantasm until end of turn
2. Activate Lazav using Mirror-Mad Phantasm's ability by paying , shuffling Lazav into your library and milling your library due to not having a card named Mirror-Mad Phantasm in it
3. Cast Thassa's Oracle by paying
4. Thassa's Oracle enters the battlefield, causing you to win the game

Results

• Infinite self-mill
• Win the game