Treebound

Treebounds are defensive-offensive plants that fire at the second closest zombie in its lane. The projectile it fires also hits the first zombie.

Overview
When there are two or more zombies in a row, Treebound will fire at the second one to deal 2 points of damage. The projectile it fires, an acorn, will then bounce off of the second zombie to hit the first from behind. The rebounded acorn now only does 1 damage to the first zombie. The acorn will continue to bounce between the two zombies, dealing one point of damage, until the distance between the two foes changed. This means that if: then the acorn will stop bouncing between the two zombies.
 * One zombie stops
 * One zombie is pushed back
 * One zombie is slowed
 * One zombie goes faster
 * One zombie dies
 * One zombie goes the other direction
 * One zombie stops to eat a plant

Treebound shoots only one acorn at each pair of zombies, unless those two zombies break distance. Treebound will then fire an acorn at the next pair of zombies. A zombie can be part of two different pairs.

If a zombie is eating Treebound, then the plant will prioritize fire at that zombie.

If there is only one zombie ahead of Treebound, then it will fire at the zombie normally, but only deal 1.5 damage points.

Treebound isn't based off of any tree in particular, and its name is a portmanteau of "tree" and "rebound."

Plant Food Ability
Under the effects of Plant Food, Treebound will gain armor that increases health. It also fires a large acorn at the second zombie. This acorn deals 30 damage points.