Living Plane + Doomwake Giant

Living Plane
Doomwake Giant

Requires
Living Plane must be in hand. Doomwake Giant must be on the battlefield. Mana needed: 2gg
Steps
  1. Cast Living Plane by paying 2gg.
  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 your opponents control.