Kudo, King Among Bears, and Elesh Norn, Grand Cenobite

Prerequisites

• Kudo, King Among Bears on the battlefield
• Elesh Norn, Grand Cenobite on the battlefield

Steps

1. Kudo causes all creatures to have base power and toughness 2/2
2. Because Elesh Norn gives creatures your opponents control -2/-2, they will be 0/0 creatures and die as a state-based action due to having zero toughness
3. This is also true for any creature that enters the battlefield under an opponent's control

Results

• Destroy all creatures opponents control
• Destroy all creatures that enter the battlefield under an opponent's control