Bill was nearing the end of his power as he felt like he could fall down and pass out at any moment. However, he didn't want to go out just yet, not until he was sure that Victor was completely dealt with.
He knew that just like him, Victor should be nearing the limit of his stamina and power as well so he quickly deactivated his mutant gene to relieve some of the strain on his body.
Nathan was celebrating internally as he witnessed Bill land such a spectacular blow on Victor, thinking that they had definitely won while Erin still had a somber expression on her face as the wounds that had been inflicted on Bill led him to unlock the second stage of his mutant gene were also fresh in her heart.
Although Erin didn't have the strength necessary to evolve her own mutant gene into the second stage, she was just as heartbroken and hurt as Bill with her also reaching new levels of power as she achieved a new level of her Ice ability.
