10 Most Powerful Mutants In Marvel History
4. Jean Grey
Though she was once known as Marvel Girl, Jean Grey has since gone on to take up recognition of her own name throughout the Marvel Universe. When she started out, she was a low-level telepath, but thanks to the way the writers have managed her character over the years, she has become something far more powerful than even Professor Xavier can contain.
Jean's natural telepathic and telekinetic abilities are so powerful, Professor X had to mentally suppress them for a time. This kept her from losing control over her powers, which could conceivably destroy whole planets...
In fact, her powers have destroyed planets thanks to her attraction of the Phoenix Force, which has occupied her from time to time. When she was initially powered by the it, she went way beyond Omega-Level Mutant and straight into cosmic-levels of godhood. She has even died and been resurrected multiple times throughout the years.
Despite the famed "Phoenix Saga" event, Jean Grey is an Omega-Level Mutant, which is why her powers attracted the entity in the first place. Her powers are rooted in her telepathy, which manifests in a number of ways including telekinesis, the formation of psionic weaponry, and the ability to take complete possession of a person's mind.