Shredder, Shadow Master, and Bloodletter of Aclazotz

Prerequisites

• Shredder, Shadow Master on the battlefield
• Bloodletter of Aclazotz on the battlefield

Steps

1. Declare Shredder as an attacker
2. Shredder's first ability triggers, creating a tapped and attacking copy of it attacking each other opponent that isn't legendary
3. Deal combat damage using the Shredders
4. Each Shredder triggers, causing each opponent to lose their entire life totals due to Bloodletter of Aclazotz
5. Each opponent then loses the game due to having 0 or less life

Results

• Each opponent loses the game
• Infinite lifeloss