Phyrexian Unlife, Magus of the Mirror, and Necropotence

Prerequisites

• Phyrexian Unlife on the battlefield
• Magus of the Mirror on the battlefield
• Necropotence on the battlefield

Steps

1. During your upkeep, activate Necropotence by paying 1 life, exiling the top card of your library face down
2. Repeat step 1 until you have zero life
3. Activate Magus of the Mirror by tapping and sacrificing it, exchanging your life total with an opponent
4. The opponent loses the game due to having zero life

Results

• Target player loses the game