Dupernova

Dupernova is an extremely powerful plant, which will kill every single zombie on the lawn when planted, none of the zombie will survive. But, it'll leave a 5x5 crater behind, killing all plants in the range. The crater lasts for 180 seconds.

Suburban Almanac Entry
Dupernova

Kill all zombies on the screen

Damage:

You just don't wanna messing around with it...

Cost:  550

Recharge: Very Slow

Trivia

 * The Dupernova based on the real supernova, but the supernova is much much stronger, it can destroy every planet in its range.
 * If you look closely, you can see its eyes.