Realizing what her game was, you slow your pursuit to put some distance between you two, but Dash was clearly in on the game as well, and matched your speed to allow Twilight to continue firing. It was only then that you realized that she was only wearing her Element; her magical-girl super form was gone, robbing her magic of it’s Harmony properties and making it fair game for cyphering on purpose. And to make matters even worse, that edge hit from her beam was evidently part of some bullshit lock-on spell, because now the beam was curving towards you to maintain contact, striking true all the time.