Vizkopa Guildmage, Tainted Sigil, and Necropotence

Prerequisites

• Vizkopa Guildmage on the battlefield
• Tainted Sigil on the battlefield
• Necropotence on the battlefield
• Greater lifetotal than the highest life among opponents
• available

Steps

1. Activate Vizkopa Guildmage's second ability
2. Activate Necropotence until you are at 1 life
3. Sacrifice Tainted Sigil
4. You gain life equal to the amount of life lost by all players this turn, and each opponent loses that much life

Results

• Near-infinite lifeloss