Rebecca was not one for half measures. Sometimes her parents said she didn't know the meaning of "overdo" or "excess". Getting this device did not help matters.
She realized first that while her memories weren't changing, her diary was, which would give her a good look at how things had happened in the new reality each of her changes created. Thinking it would take too long to read through the thing each time she made a change, she looked through the "Superpowers" menu, looking for something specific.
She found it: "Speed-reading". Selecting it, another note popped up: "Allows subject to read any amount of text in seconds. When combined with X-ray VIsion, subject can read anything in seconds simply by glancing at it."
Deciding that this, too, would save time, she selected X-ray Vision as well, pointed the device at herself, and hit Warp.
Once again, she found that she knew how to use her new powers, even though she couldn't remember having them. Glancing at her diary, she noticed things she hadn't before: new stuff, about how she had to fake poring over books in class even though she'd read them almost as soon as she got them, and old stuff, about how while she liked her figure, other girls teased her about it. Seeing that, Rebecca was somewhat glad she didn't get the new memories. She knew how far some of those girls' "teasing" went.
Thinking back on her experience with her clones, she realized that while having autonomous clones wasn't such a great idea, more of her could bring in more money than fewer. Again looking through the Superpowers menu, she noticed one that would allow her to make copies of herself that remained under her control, and she could manifest them wherever she wanted, wearing whatever her original body was wearing. Selecting it, she pointed the device at herself again and hit Warp.
Her room changed again. There was now a large TV on one wall, and what looked like a very good computer on another. Her diary also changed: it was thicker now, and had a lot of entries about all the various jobs she was holding down. It did, however, enthuse about how she only had to eat and sleep for one--apparently everything that was done to her body (but not her clothing) happened instantaneously to all her bodies.
Again looking around her room, she found a work schedule. Thankfully none of her jobs started for another hour. Looking again at her diary, she confirmed her suspicions: she would put on her clothes for a job, copy herself to about a block or two nearby, then put on the next uniform, and repeat until all her clones were at work.
Copying herself to stand in front of her, she was immediately struck by how strange it was: there she was, right in front of herself, looking at herself look at herself from two different pairs of eyes!
Now with what amounted to a living "mirror", she sat down on her bed and made more changes. Having always wanted to tower over her classmates, she went to the Size setting and made her height 7'9". Her diary now discussed how she could be the star of the basketball team if it weren't for her huge breasts and butt making it difficult for her to play effectively. She also decided to give herself many more superpowers, all in the name of testing how far she could push this apparently-miraculous machine: flight, infinite strength (why be limited?), infinite speed, invincibility, teleportation (self and others, of course), telepathy (passive and projective), telekinesis, invisibility, super-senses, super-intelligence, and noticed one that looked strange: "self-sustaining life force". Reading the note on the last one, it said that the subject would not have to perform any tasks normally associated to living, such as eating, breathing, or sleeping, and could do things like remain alive in a total vacuum or underwater or in other such harsh environments for as long as desired. Selecting it as well, she wondered if she'd have any doctorates on her wall after hitting Warp. Again pointing the device at herself, she hit Warp.
The first thing she noticed was that she felt--in both her bodies--amazing. Her muscles and mind felt supercharged. She teleported her scissors into her hand and attempted to cut herself. Feeling nothing, her vision told her that the blade was completely dull. She was also picking up thoughts: her parents, thinking how nice it was that their second daughter was so helpful around the house; her older sister, thinking how unfair it was that she was only now applying for college while her younger sister had multiple doctorates already (and how unfair it was that her parents were insisting she do so, though Rebecca didn't understand why); her younger sister, thinking how cool it was to fly around with her older sister; even her friend Sarah, thinking how great it was to be friends with her, but jealous that Rebecca got all the attention and that she couldn't even rate as a sidekick.
Looking for her diary, she instead found a huge stack of them. Reading them at a glance, she found out that she had received her first doctorate at 14 and hadn't slowed down since. Her discoveries were nothing short of groundbreaking and she'd heard rumours that she might become the youngest Nobel Prize winner in history. She apparently had a very public profile: she was a scientist, successful entrepreneur with a net worth already in the tens of millions, and a superhero revered by many. Just recently she had prevented the assassination of a high-profile senator and rescued two hundred people from a sinking cruise ship in the mid-Pacific simultaneously, but hardly a day went by when she wasn't to be found in multiple places in the papers.
She also noticed that her room was far more spacious: she had used a fair deal of the money from her businesses to buy a huge house for her family, and staffed it herself. Indeed, she could see through the eyes of ten of her preparing a meagre supper: only three courses for twenty guests, apparently small by her standards. She was also keeping the gardens perfect, helping Kim with her homework, fixing one of the family's ten Rolls-Royces (and driving her father and his friends to the country club in another one), staffing her various corporate offices, guiding a plane with no working engines safely to ground, terraforming Mars... all in all, feeling thousands of bodies all doing different things at once was overwhelming for her, but once again, she just knew how to do them all. None of her other bodies had so much as skipped a beat, it seemed. She also understood why Lauren felt having to go to college was unfair: her sister was, it seemed to her, willing to provide for her for the rest of her life, so why should she ever have to do anything for herself? (And besides, Rebecca caught Lauren thinking to herself, it was just so unfair that her sister's genes should be so great while hers left her plain and normal. How many mutations does it take to give someone all that Rebecca had?)
Wondering about her clothes--shouldn't friction burn them off?--she noted that one of her first discoveries had been a chemical that made anything completely resistant to heat, which was why she hadn't seen any burning-building-rescues or forest fires in her diary. She had made the chemical freely available to all, and it was now ubiquitous, and otherwise completely inert.
Reluctantly deciding to put off using the device on herself any more--for now--Rebecca, knowing her mind would keep all her other bodies doing what they were doing, figured she might as well have some fun. She decided she wanted to try pranking people (which had come into her head as soon as she saw just how many superpowers she could give herself, and which she apparently already did, though not at the moment), but she also wanted to make her friend Sarah into a proper sidekick.