Slow Boss

Description
The tanky boss is an early mid wave zombie only appearing in Easy and Normal. It first appears on wave 22 on any map (Except Hard, Insane and Event.) It can only appear on Hard or Insane if it's broken free from a Uber Mystery.

This zombie appears as a huge threat as it has very high health and appears on a early wave.

Appearance
The Chained Boss is a huge muscular looking zombie, It has lumps on it's arm and spikes on it's hands and back, it has red eyes stitched mouth and stone looking body.

Strategy
Since Chained Boss appears on a early wave you won't have as much strong towers ready, lots of starters towers together could drain the slow boss, but it's recommended someone saving up for a strong tower like Minigunner.