Atmos-pear

Atmos-pear is a premium plant that appears in Plants vs. Zombies 2. She is obtained by buying her from the shop using 100 gems.

Atmos-pear is a single use plant. Once planted, she will slowly charge for 10 seconds. After the channel time ends, the literal atmosphere of the world will lower, which will kill anything, plant or zombie. This includes heavy defense plants and Gargantuars.

Origin
Atmos-pear is based off of Pyrus, or more commonly known as a pear. Its name is a portmanteau between "atmosphere", its ability, and "pear", its appearance.

Enchant-mint effect
When boosted by Enchant-mint, Atmos-pear will channel 2 seconds less.

Level upgrade
Unlike most plants, Atmos-pear does not have a levelling upgrade.

Strategies
Atmos-pear is best used as a last resort. Take note that she doesn't only kill all zombies, but all of your plants too. This plant is in full efficiency when the board is filled with hordes of zombies, and your current plants can't take them on. Always weigh your options before using this plant, or else you will only regret it.

Trivia

 * Atmos-pear's design is alien-like, despite having no alien-esque abilities.
 * Although she literally lowers the atmosphere, the Player, Crazy Dave, or any other following waves of zombies are not affected by this at all.