Heartless Hidetsugu, and Warlock Class

Prerequisites

• Heartless Hidetsugu on the battlefield
• Warlock Class on the battlefield

Steps

1. Activate Heartless HIdetsugu by tapping it, dealing damage to each player equal to half their life total, rounded down
2. At the beginning of your end step, Warlock Class triggers, causing each opponent to lose life equal to the life they lost this turn
3. Each opponent with an even life total loses the game due to having 0 or less life

Results

• Each opponent with an even life total loses the game
• Near-infinite damage to all players
• Near-infinite lifeloss