Grain Worm

Grain Wormm is a plant in ________. It can only be planted on full-heath zombies.

Overview
Grain Worm absorbs 1 Gargantuar smash. It deals no damage and can only be planted on a full-health zombie, but the player can control the zombie it is planted.

As the zombie the Grain Worm is planted on is fully controllable, it can be a good idea to plant quite a few of these. However, it can also be bad since they can't control Gargantuars, bosses or robots. If there are no zombies on the field but there are robots/Gargantuars, it will control the nearest offensive plant, making it controllable by the player.

Almanac Entry
Grain Worm slithers up in zombies' brains, allowing the player to control the zombie. When the zombie is eaten by another zombie, the Grain Worm slithers after the nearest zombie.

Damage: None

Recharge: Sluggish

Rescued from a rockfall by Crazy Dave one spooky scary night, Grain Worm learned his purpose in life when he was given the job as a police chief- until the zombies destroyed the police station. Then he just learned to take over any zombie in his way.

Strategies
Place this on the strongest zombie on the field. As it is controllable after the Grain Worm infects it, it can be used to basically obliterate the entire field if infecting a Buckethead. Be wary, as you are unable to infect robots or Gargantuars.

It is very useful to use on very large waves of zombies, slowly wearing the wave's health down. And since it can be planted on Buckethead zombies, you can use the Grain Worm as a perfect support plant.

Trivia

 * The title is a pun on grain, a plant similar to wheat, and brain worm.
 * It may be based on a type of parasite that burrows itself into the brains of corpses and infects them, where it then controls their body movements. The fact that Grain Worm burrows itself into zombies makes complete sense.
 * You can't place a Grain Worm on a Gargantuar or robots. In fact, when the zombie it is infecting is killed, it can be squashed by the Gargantuar before it is able to infect another zombie.
 * It moves at the speed of an Imp once the zombie it infects dies.