Gisela, Blade of Goldnight, and Heartless Hidetsugu

Prerequisites

• Gisela, Blade of Goldnight on the battlefield
• Heartless Hidetsugu on the battlefield

Steps

1. Activate Heartless Hidetsugu by tapping it, causing it to deal lethal damage to each opponent with an even life total, nearly lethal damage to each opponent with an odd life total, and damage to you equal to a quarter of your life total

Results

• Each opponent with an even life total loses the game
• Near-infinite damage