Aether Flash, and Living Plane

Prerequisites

• Aether Flash on the battlefield
• Living Plane on the battlefield

Steps

1. Whenever a land enters the battlefield, it enters as a 1/1 creature due to Living Plane
2. Aether Flash triggers, dealing 2 damage to the land
3. The land dies as a state-based action due to having less than zero toughness

Results

• Destroy all lands that enter the battlefield