Serpentor

Arrogant, cruel, sadistic, merciless, insane, these words best describe the horror that is Serpentor.

Created by Dr. Mindbender, Destro, and the Crimson Twins merely because they grew tired of Cobra Commander's incompetence and cowardice (and also by the TRUE founder of COBRA, Golobulus for the same reason, via a psychic motivator), Serpentor was created using DNA of some of history's greatest villains and conquerors, such as Napoleon, Ivan the Terrible, and Alexander the Great. Sun Tzu's DNA was almost acquired, but foiled by G.I. Joe, so the DNA of Joe trainer Sgt. Slaughter was substituted. Once created, Serpentor over threw Cobra Commander, and proved to be a more effective leader, but was ultimately more monster than man. Eventually, the betrayer was betrayed when Cobra Commander used science to transform him into an iguna...at least temporarily.

Powers
Incredibly strong and intelligent.