Complex sentence: The Joes fight Cobra around the globe in an attempt to stop them from collecting the DNA samples, however, Mindbender completes the process, creating the ingenious but petulant and impatient Serpentor who is installed as the ultimate leader of Cobra.
Split into simpler sentences: The Joes fight Cobra around the globe, in an attempt to stop them from collecting the DNA samples. However, Mindbender completes the process, creating the ingenious but petulant and impatient Serpentor, who is installed as the ultimate leader of Cobra.