Xavier Institute Villain File. 

Powers: Besides superhuman mass, durability and strength, the Blob can create a mono-directional gravity field that renders him virtually immovable as long as he remains in contact with the ground.

From Xavier, the Blob had learned he was a superhumanly powerful mutant. Believing himself superior to ordinary humans, Dukes returned to the carnival intent on a hostile takeover. Knowing the X-Men considered him a threat because he had breached their inner circle, Dukes led his fellow performers on an attack of Xavier's mansion. The Blob hoped to turn the X-Men's advanced technology and sophisticated weaponry on an unsuspecting populace. But the young mutants defeated Dukes and his allies, and Xavier wiped their memories of the incident.

Magneto, the mutant Master of Magnetism, restored Dukes' knowledge of the X-Men. Alongside the genetic terrorist's Brotherhood of Evil Mutants, the Blob clashed with Xavier's students once again. In the midst of a pitched battle, Magneto launched a powerful torpedo at the X-Men. That the slow-moving Blob stood in the projectile's path in no way concerned him. The shell struck Dukes, though it inflicted no serious damage. The Brotherhood escaped, but the Blob had begun to question Magneto's leadership. Feeling betrayed, Dukes returned to the carnival.

Later, the sinister shapeshifter known as Mystique recruited Dukes for another incarnation of the Brotherhood. Capitalizing on Washington's increasing anti-mutant bent, Mystique offered the squad's services to the government. Rechristened "Freedom Force," the team's first official mission was to capture Magneto. Future ops brought the Blob and his teammates into conflict with the planet's foremost superhuman protectors -- most notably the X-Men, X-Factor and the Avengers. For the duration of the team's existence, the Blob was bemused by the fact that he could indulge his violent tendencies and fight old foes while drawing a government paycheck. In the wake of a disastrous mission to the Middle East, the government disbanded Freedom Force. The Blob once again found himself a free agent.

When Magneto reformed the Brotherhood yet again, Mystique talked him into rejoining, Even thought it was Magneto in charge and not Mystique.