Extinction Event

Extinction Event is a in Plants vs. Zombies Heroes, and a member of the  class. It costs 2 to play, and its ability gives a selected plant and all of its other copies currently on the field -2/-2.

Origins
It is based on the event that happened a few times during the Earth's history with the same name.

Its design resembles the loading bar in the original Plants vs. Zombies.

Statistics

 * Class: Beastly
 * Tribe: History Trick
 * Ability: A Plant gets -2/-2. All other copies of that Plant also get -2/-2.
 * Set - Rarity: Colossal - Super-Rare

Card description
Sometimes the evolutionary tree withers at the root.

Update 1.22.12

 * Added to the game.

With
Giving a plant -2/-2 for only 2 brains is already a cost-effective trick. If there happens to be two or more of the same plant, even better. Therefore, this trick is especially great against decks that rely on making multiple of the same plant, such as Pineclone or Snake Grass decks. The Smash can use this so he can destroy all Pineclones on the field with a single Weed Spray, while Electric Boogaloo can combine this with The Chickening or Fireworks Zombie. However, playing two Extinction Events is cheaper.

It is also important to remember that, although they appear similar, the plants made by Pair of Pears and Shroom for Two do not count as the same plant.

Against
While it isn't possible to stop an opponent from playing this other than by playing Brainana or having an, having a diverse roster of plants or transforming cards is the best way to mitigate its effect.

Trivia

 * During development, it was called "Wilting Away," costed 3 brains, and destroyed a plant confronted by a zombie.
 * Although multiple zombie arms are seen on the card and statistics, when Extinction Event is actually played, only one zombie arm appears, the one grabbing the flower.