Cephalid Illusionist, Nomads en-Kor, Narcomoeba, Dread Return, and Thassa's Oracle

Prerequisites

• Cephalid Illusionist on the battlefield
• Nomads en-Kor on the battlefield
• Narcomoeba in the library
• Dread Return in the library
• Thassa's Oracle in the library

Steps

1. Activate Nomads en-Kor, targeting Cephalid Illusionist
2. Mill 3
3. Repeat this process until you mill your entire library
4. When you mill Narcomoeba, put it on the battlefield
5. Flashback Dread Return, sacrificing Nomads en-Kor, Cephalid Illusionist, and Narcomoeba, targeting Thassa's Oracle
6. Resolve Thassa's Oracle's trigger with no cards in your library

Results

• Infinite self-mill
• Win the game