Cassie had no idea what was going on, but every time she said "totally Cassie", people she said it to gained a little bit of her. Her catchphrase was now a weapon, and when she said it to the barista at Starbucks he gained her trademark blonde on black hair with it in a ponytail.
This was all too much... But maybe she could finally fix the wrongs in her life... And maybe make her sister more friendly closer in the process.
Nothing corrupts more than power. No evil mental effects changing her. Just her, taking advantage of her power.
She got into the house that night and was already arguing with her sister. She had it and started saying "totally Cassie" and her sisters red ponytail rose up her head, and settled into a high ponytail like hers. She said it again and her sisters socks became her matching blue ones as her eyeshadow became blue instead of purple in a blink. Then her sister Alice forgot why they were arguing. "I love your hair sis" Alice said. "It's totally Cassie"
"It is totally Cassie!" She said back as her sister gained her freckles and her hair morphed into Cassie's blonde and black hair.
"Whoops" Cassie said. I better be careful. She thought.