Diamond Valley, Serra Avatar, and Vizkopa Guildmage

Prerequisites

• Diamond Valley on the battlefield
• Serra Avatar on the battlefield
• Vizkopa Guildmage on the battlefield
• You have the highest life total or are tied for the highest life total
• available

Steps

1. Activate Vizkopa Guildmage's second ability by paying , causing each opponent to lose life when you gain life this turn
2. Activate Diamond Valley by tapping it and sacrificing Serra Avatar, causing you to gain life equal to Serra Avatar's power
3. Vizkopa Guildmage triggers, causing each opponent to lose life equal to the life you gained
4. Each opponent loses the game due to having zero or less life

Results

• Each opponent loses the game
• Near-infinite lifegain
• Near-infinite lifeloss