as the x-men storm stryker's base on alkali lake, jean accompanies magneto and mystique to open the second cerebro chamber, but jean is forced to fight a brainwashed cyclops. when cyclops unleashes the full power of his optic blasts, a power that, according to jean earlier could potentially "punch a hole through a mountain", jean erects a psychic shield and once more unleashes the full extent of her power; her eyes once more burn red and a fiery corona of energy surrounds her as she blasts cyclops away. the sheer force of the explosion of the two's powers causes a deep crack in the dam itself, and sends the two combatants flying across the room from each other. jean's blast woke scott from his trance, though she injures her leg. they reunite with their friends and discover that magneto fooled stryker's son, jason, into manipulating xavier to kill all humans instead of mutants, though they foil the plan. as they make their way back to the x-jet, the controls are damaged due to the base falling apart. jean unleashes her fully developed powers: she begins to fix the blackbird's technical problems, locks all forms of exit to prevent a rescue attempt from distracting her from what needs to be done even preventing nightcrawler from teleporting to her, and telepathically possesses professor xavier in order to say goodbye to her loved ones. she then creates a massive psychic barrier and holds back the entire wave of alkali lake, all while lifting the repaired blackbird out of harm's way. jean's eyes burn red and her entire body is engulfed in powerful psychic flames as she uses the last of her power to fly her friends to safety before a look of complete peace engulfs her as she drops her hands, allowing the rushing water to finish its work and is apparently killed by the flood, devastating both logan and cyclops. at the end of the film, however, the shape of a phoenix is shown.