This lane is not a Card that can be played by either Plants or Zombies, it is just a Lane that could or could not randomly spawn. I thought a better idea though would be make a Lost City Level where it always generates or the other way around works too. Here’s the idea and name.
Lane Name: Rolling Rock Trap Tile Lane.
Effect: When a Plant or Zombie is played in this lane it triggers a rolling rock to come rolling over the lawn destroying all Plants and Zombies. LOL I can see this as a funny way to mess with your opponent or it could even backfire.