Always one for the adrenaline rush of imminent danger, Sharon would go stunt-bike riding with the Thunderiders. During that time, Ben Grimm of the Fantastic Four had met and fallen in love with a woman (Tarianna) who looked exactly like Sharon on Battleworld during the Secret Wars, and he returned to Earth looking for Sharon. Not realizing this, Sharon voted for Ben to replace her on the Thunderiders team and she left.
Ben moved on to join the Unlimited Class Wrestling Federation and Sharon secretly attended his matches. Eventually, the two grew close, although Sharon only wanted a friendship while Ben wanted more. When a group of female wrestlers called the Grapplers thought Ben guilty of the murder of one of their members, Sharon tried to help him. This brought her to the attention of Auntie Freeze who was their manager. Auntie introduced Sharon to the Power Broker. Sharon signed up for the Power Broker's program in order to join the Unlimited Class Wrestling Federation (UCWF). The Power Broker employed Dr. Karl Malus to create super-powered wrestlers for his competitions, but Sharon was unaware of the criminal activities of Jackson or Malus. While boosting their subjects' strength, the pair addicted the subjects to a drug, ensuring their obedience. Sharon was given a costume by Auntie Freeze and was given the code-name Ms. Marvel.
During her treatment to enhance her strength, Sharon changed her mind. She was unwilling to become addicted to the drug that would be injected into her. She was able to break free and, after Thing's timely arrival, flee.
Learning of how many people were now addicted to the drug Power Broker used, Sharon decided to take the battle to him. She was sold out by her (then) boyfriend and taken hostage by the Power Broker and Karl Malus. They attempted to remove her powers from her. Alongside that, various henchmen not only tortured her but raped her as well. Luckily, she had some help from Captain America to bring it all down.
