Phyrexian Unlife, Repay in Kind, and Necropotence

Prerequisites

• Phyrexian Unlife on the battlefield
• Repay in Kind in hand
• Necropotence on the battlefield
• available

Steps

1. Activate Necropotence by paying 1 life, exiling the top card of your library
2. Repeat until your life total is 0
3. Cast Repay in Kind by paying , causing each player's life total to become 0

Results

• Exile your library
• Infinite lifeloss