Living Plane, and Doomwake Giant

Prerequisites

• Living Plane in hand
• Doomwake Giant on the battlefield
• available

Steps

1. Cast Living Plane by paying
2. Living Plane enters the battlefield, triggering Doomwake Giant, giving all opposing creatures -1/-1 until end of turn
3. Because Living Plane causes all lands to be 1/1 creatures, all of your opponent' lands die as a state-based action due to having zero or less toughness

Results

• Destroy all lands opponents control