Elderberry

Elderberry is a plant that makes zombies that eat it older.

Effect
When a zombie takes a bite out of it, it becomes older, making it as slow as a zombie affected by snow pea, and has a 5% chance of taking twice as much damage from projectiles (Old zombies don't have any chance of taking twice as much damage from plants that deal more damage than 10 or are instant kills). Once elderberry is eaten, it's monocle will fly off and onto a random plant, making that plant absorb 6 more NDB. Gargantuars, balloon zombies, vehicles and bosses are not affected by elderberry, yet when elderberry's monocle flies off, it has a 20% chance of flying into on of these kinds of zombie's face, dealing 2 NDS to it. Elderberry's appearance changes every time a bite is taken out of it. Once a zombie bites elderberry, it won't bite it again, and will continue moving as if elderberry isn't there.

Almanac Entry
Elderberry may be old, but he's still defiant. Defiant to physics, that is. How do you become years older in seconds?

Trivia

 * Elderberry is based on the real life plant by the same name.