Boss4 is a unique type of enemy. Unlike most other zombies, it can preform a punch attack, effective nearby towers, which deals much heavier damage than regular contact damage. Other statistics aren't too impressive, though it does have notably high health. The Boss4 has a dark green skin color, and a black outfit. Its left arm is bare, while its right is outfitted with a short sleeve and an armband. It has a knife embedded in the back of its head. It's Powerful and Best Friends with Boss3.