Dark Leo & Shredder, and Bloodletter of Aclazotz

Prerequisites

• Dark Leo & Shredder in hand or on the battlefield or in the command zone
• Bloodletter of Aclazotz on the battlefield
• plus commander tax if applicable if Dark Leo & Shredder isn't on the battlefield available

Steps

1. Declare Dark Leo & Shredder as an attacker if it's on the battlefield, or another creature you control otherwise
2. If Dark Leo & Shredder isn't on the battlefield, when the declared creature is unblocked, cast Dark Leo & Shredder either from your hand or from the command zone for its sneak cost by paying plus commander tax if applicable and returning the unblocked attacker to your hand
3. Deal combat damage using Dark Leo & Shredder, triggering its second ability, creating a 1/1 Ninja creature token and causing the opponent to lose their entire life total due to Bloodletter of Aclazotz

Results

• Infinite lifeloss for target opponent