Something soon dawned on Ty- even if he had near infinite power, he was still only 15. There was so much he couldn't legally do and would have to find ways to get around, not to mention in a lot of ways he knew he was still a child and hated it. He decided the best way to fix that was to wish to be 18.
Once he wished for it, he felt his body speed through three years of development. He pretty much completed puberty in a few seconds, his late bloomer status vanishing as he grew taller and subtly more muscular and hairy all over, and his cock reached its full mature size, about seven inches. His clothes thankfully grew as he did, and he noticed he seemed to be wearing larger sizes of them.
As the changes finished, he stood up and went to his closet mirror, and was ecstatic to see how mature he looked. No one would have to ID him for anything like this, and he felt like people might find him attractive now, which was a big plus. Not to mention changing himself had felt surprisingly pleasurable. He felt tempted to do it again in a different way, though of course he could also just go out and party too...