Mister X is a Marvel Comics villain and an enemy of both Wolverine and Deadpool. Mister X's real name is unknown.
When Mister X was a child he was born to wealthy parents and wanted for nothing. An incident during his childhood however, changed his life forever. X witnessed an accident in which a woman was hit by a car. X watched as the woman died in his arms and found the experience glorious.
Later in his life he could find nothing to top the experience and turned to murder to full fill his needs. Eventually he thought that killing started to lose intrerest, so Mister X decided he needed to hunt much more difficult prey and began training to become a total killing machine. Mastering all forms of martial arts, boxing and over hundreds of forms of combat armed and unarmed Mister X seeks out the best of the best to kill and there fore prove himself the best.