Board Thread:Plants vs. Zombies 2: It's About Time/@comment-25832612-20150409040610/@comment-25255719-20150412123928

The Magic Star wrote: I got an idea for a plant for Lost City, Blueberry Trap. It kills the first group of zombies that step on it, and after that, it only stops the second group for a while, then dies. Costs: 75 sun

You could just put potato mine and stunion behind it and the you have the same effect.