When Sgt. Slaughter destroys a batch of DNA needed for the creation of Serpentor, Dr. Mindbender is undaunted by the action and makes his decision for the subject for a substitute batch, much to the surprise of COBRA.
Dr. Mindbender continues his mission to collect the DNA of ancient conquerors. After Sergeant Slaughter retrieves a DNA pack from Cobra's raid on Sun Tzu's tomb, the Joes suspect that Cobra is building a new breed of soldiers and set out to stop them.