Ballista Zombie

Ballista Zombie is a Zombie in Plants vs. Zombies 2. It is a group of 2 zombies which work together to pull back a drawstring, and launch large, sharpened poles at your plants.

Overview
Ballista Zombie can absorb 50 normal damage shots. The ballista slowly degrades at 18 damage shots, 29 damage shots, and 39 damage shots. The ballista falls apart at 50 damage shots, and kills the two zombies pulling it's drawstring. Ballista Zombie can really pound on your defense if defended well enough by other zombies. The bolts kill any plant, regardless of attributes.

Strategies
Ballista Zombie is very dangerous, and while there aren't many ways to completely stop the loading of the Ballista, you can slow it down. Ice plants, especially ones with splash, will hit the Ballista Zombie and slow down the process of pulling back the drawstring. If you are lucky enough, you would be able to kill the Ballista Zombie then and there while it tries to reload. If you can slow it, but it doesn't seem to be killing it, instant kills will always work, especially since the Ballista is rare in this game. However, be wary of the recharge time of the instant kills, and only use them when absolutely necessary.