Doomgape, Serra Avatar, and Sanguine Bond

Prerequisites

• Doomgape on the battlefield
• Serra Avatar on the battlefield
• Sanguine Bond 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. Sanguine Bond triggers, causing an opponent to lose life equal to the life you gained

Results

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