Solphim, Mayhem Dominus, and Heartless Hidetsugu

Prerequisites

• Solphim, Mayhem Dominus on the battlefield
• Heartless Hidetsugu on the battlefield
• Each opponent has an even life total
• Heartless Hidetsugu does not have summoning sickness

Steps

1. Activate Heartless Hidetsugu by tapping it, dealing an amount of damage to each opponent equal to their life total, and dealing damage to you equal to half your life total, rounded down
2. Each opponent loses the game due to having zero life

Results

• Each opponent loses the game
• Near-infinite damage to all players