Before testing the new book Ethan was curious if the two would have any effect on each other. He brought them near each other and was surprised to see the two of them glow and, strangely, merge together. When the glowing stopped there was only one book, the cover of which said the Book of Time and Body with half of it blue and half of it rust red. "She never mentioned that part," Ethan muttered, "If they merge together... then what if they're all the same book. And if they're the same book then if someone merged all of them back together... that could be bad."
Ethan shrugged. He had two of them, so if anyone wanted to re-create the true book they would have to go through him. And he was about to make that a little more difficult.
Flipping through the book Ethan came to the Body section and found the spell he was after; Muscle Growth. Wanting to make sure he saw the full effects of the spell, Ethan pulled off his shirt and went to the bathroom with the book in hand. Once there he thought of how much muscle he wanted and said "Muscle."
What happened next was quite amazing. Every muscle in his body felt, for a moment, extremely sore like he'd just worked them out for hours. Then, just as suddenly that soreness surged into strength as he saw all of his muscles grow under his skin and, thanks to his slim young body, became extremely toned. It took only a few seconds, and when it was done he was quite a sight. He hadn't wanted to get too much bigger, because he didn't want to become too large for his clothes, but he was still a fair sight nonetheless.
His torso was perfectly toned, showing well-developed pecs and a perfect six-pack that could still be slightly seen when unflexed. And, although he couldn't quite see his back, he could still see that he had a decent v-shaped torso now from his larger back muscles. Ethan could see his shoulders were round and stood out, especially when he flexed them, and his arms showed great definition and quite decent size, even when unflexed. When he flexed his arms he saw his biceps bulge up on his young arms, and he proceeded to flex his triceps as well and do a few more poses. He was now an extremely athletic ten-year old, like a young gymnast or skateboarder, or both. He quickly pulled off his jeans to checked his larger and more toned legs as well. "Oh yeah," Ethan muttered, holding his arms over his head and flexing his abs, "Who's a sexy guy? Me, that's who," he added half-jokingly.
After a few more poses of his lean muscles he went back to his room and pulled his shirt back on. Luckily it still fit, though his pecs clearly pushed it out and it felt a bit snug when he flexed his arms or spread his back. But other than that it was still as loose and baggy as ever. "So what to do now..." Ethan thought. "I could go to the skatepark, maybe make some new friends. Maybe I could invite some friends over." With a shrug he went to his computer and started watching random YouTube videos while he thought of something.