Mindslaver, and Mages' Contest

Prerequisites

• Mindslaver on the battlefield
• Mages' Contest in hand
• An opponent has a spell in hand that they can cast
• available

Steps

1. Activate Mindslaver targeting another player
2. On their turn, have them cast a spell
3. In response, cast Mages' Contest targeting the spell they cast
4. Have them pay their entire life total to Mages' Contest, killing them

Results

• Target player loses the game