Metamorphic Alteration, Mirror-Mad Phantasm, and Thassa's Oracle

Prerequisites

• Metamorphic Alteration in hand
• Mirror-Mad Phantasm on the battlefield
• Thassa's Oracle in hand
• available

Steps

1. Cast Metamorphic Alteration by paying
2. Metamorphic Alteration enters the battlefield, causing it to become a copy of Mirror-Mad Phantasm
3. Activate Metamorphic Alteration using Mirror-Mad Phantasm's ability by paying , causing you to shuffle Metamorphic Alteration into your library and mill all cards from your library
4. Cast Thassa's Oracle by paying
5. Thassa's Oracle enters the battlefield, causing you to win the game

Results

• Win the game