Heartless Hidetsugu, and Fiendish Duo

Prerequisites

• Heartless Hidetsugu on the battlefield
• Fiendish Duo on the battlefield
• 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 who had an even life total loses the game due to having 0 or less life
3. Each opponent who had an odd life total will have 1 life remaining

Results

• Near-infinite damage to all players