Doomgape, Serra Avatar, and Defiant Bloodlord

Prerequisites

• Doomgape on the battlefield
• Serra Avatar on the battlefield
• Defiant Bloodlord on the battlefield

Steps

1. At the beginning of your upkeep, Doomgape triggers, causing you to sacrifice Serra Avatar and gain life equal to its toughness
2. Defiant Bloodlord triggers, causing an opponent to lose life equal to the life you gained

Results

• Near-infinite lifegain
• Near-infinite lifeloss for target opponent