With the book in your hand you rushed up the stairs to your room and thought of your first victim.
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Across town Abe Jackson was getting changed into his pyjamas. Abe was one year younger than you at the age of 17 and was the most popular boy in the year below you, and was constantly surrounded by all the other boys. He was so popular because of his looks, with broad shoulders and muscles, he was the perfect amount of buff for someone his age. Whenever any girls talked to him they always seemed like they were about to get down on their knees, and all they guys wanted to be him. His blond hair only made him look even more like the stereotypical jock.
But there was just one thing about him, he was a massive jerk. He was the sexiest person in your school but remained single because nobody wanted to date such an ass. Despite that, you still found yourself unable to avoid looking at his ass and back whenever he walked past him, even if he was a massive dick.
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Blake thought of who he wanted to swap with, and Abe was the first person he thought of. Reading the spell from the book, he said the words that would change his body and life.
"Blake Strange, Abe Jackson, Ancient Powers that be, SWAP! ONE WEEK!"
Blake instantly felt his body gaining mass and saw his skin changing into a beautiful surf boy tan. His pecs, biceps, and abs grew and soon they were outlined in his shirt which was getting increasingly tighter. His ass filled out and began to round out and so did his legs. His height shot up to 6'6 and body filled just a little bit more before ending. He smiled and admired his longer limbs and his heavier weight.
"Oh yeah, I'm a sex machine now"
Blake began to hatch another plan in his mind. He took out the book and flipped to the Spells of Augments and Modifications section. He soon found the body changing section, it read:
"Changing one's body is simple...if you have the right spell. You have the amount prefixes: Me- (Small), Deis-(Medium), Contin-(Large). These are just the basic prefixes though. There are many, but for now here are some spells to help increase your body's size."
Blake flipped through the pages until he found what he wanted, a growing spell. He said “crescere” in his deep voice which rumbled in his throat, and he felt his whole body expanding. His shoulders broadened, his pecs inflated, and his biceps grew. His legs cracked as they grew longer, and his ass filled out more. He felt himself getting an 8 pack, and his thighs grew thicker. He said the stop command, “incrementum prohibere”, and felt the changes stop. Over the next half hour Blake continued making modifications under the book's guidance, until he was happy with himself.
Blake was now 1000kg of pure muscle, and he looked fucking hot. He was 7” 8’, and now everybody would want him. At the end of the chapter he saw a little note:
"Now that you've changed your body (i.e switched bodies, modified and augmentations etc.) it's time to normalise everything so people don't question. Chant the spell, 'Rectifius Distortia'.
"Rectifius Distortia!" Blake said in his new deep voice, his voice made everything in his room rumble and shake. The spell sent a wave of energy out...Blake thought it did something so no one would notice all the changes he did...or his inhuman proportions and size. He walked and made his floor rumble but not break entirely...
"I guess that spell made it so that big guys like me don't break everything I touch," he said and laughed a hearty laugh. He looked at himself in his full size mirror; his massive muscles tensed under his tanned skin, and his pecs and nipples were rock hard. He smiled, "Tomorrow will be the most fun ever," he said. He slid the book way under his new reinforced bed and collapsed on it, promptly going to sleep.