Archfiend of Despair, Malignus, and Xathrid Demon

Prerequisites

• Archfiend of Despair on the battlefield
• Malignus on the battlefield
• Xathrid Demon on the battlefield

Steps

1. At the beginning of your upkeep, Xathrid Demon triggers, causing you to sacrifice Malignus and causing each opponent to lose life equal to Malignus's power
2. At the beginning of your end step, Archfiend of Despair triggers, causing each opponent to lose life equal to the amount of life they lost this turn
3. Each opponent loses the game due to having zero or less life

Results

• Each opponent loses the game