Progenitus, Dream Halls, Archfiend of Despair, and Jarad, Golgari Lich Lord

Prerequisites

• Progenitus on the battlefield
• Dream Halls on the battlefield
• Archfiend of Despair on the battlefield
• Jarad, Golgari Lich Lord on the battlefield
• You have at least one card of any color in hand
• Opponents have 40 or less life total
• Enough mana to pay for commander tax, if applicable

Steps

1. Activate Jarad by sacrificing Progenitus, dealing 10 damages to each opponent
2. Cast Progenitus by discarding a card of any color and paying commander tax, if applicable
3. Activate Jarad by sacrificing Progenitus, dealing 10 damage to each opponent
4. At the beginning of your end step, Archfiend of Despair triggers, causing the opponent to lose life equal to the life they lost this turn

Results

• Infinite lifeloss