Mister Negative, Blood Celebrant, and Pact Weapon

Prerequisites

• Mister Negative in hand or in the command zone
• Blood Celebrant on the battlefield
• Pact Weapon on the battlefield
• available

Steps

1. Activate Blood Celebrant by paying and 1 life, adding Repeat step 1 until you have 0 life
2. Cast Mister Negative by paying plus commander tax if applicable
3. When Mister Negative enters, it triggers, swapping your life total with an opponent's
4. The opponent loses the game due to having 0 life

Results

• Near-infinite lifeloss for target opponent
• Target opponent loses the game