Greven, Predator Captain, and Unspeakable Symbol

Prerequisites

• Greven, Predator Captain on the battlefield
• Unspeakable Symbol on the battlefield

Steps

1. Activate Unspeakable Symbol by paying 3 life
2. Repeat step 1 until Greven has power 21 or greater due to its first ability
3. Deal combat damage to an opponent using Greven
4. The opponent loses the game due to being dealt 21 or more combat damage from your commander

Results

• Target opponent loses the game