Big Brent was surprised by everything that was happening. Yet he let out a low moan as my lips wrapped around his cock, the hard tool throbbing in my mouth. I went back and forth along it, sucking with glee. I reached into my pocket, discreetly touching the tip of the wand as I wished that I had incredible sexual skills. A moment later, I realized how much better I could be doing this. I paused, then went back at it with renewed vigor. Brent howled with surprise and lust as I worked his big rod over, his fantastic new muscles tensing involuntarily as I sent shockwaves of pleasure through his powerful body. He was panting hard, his broad back up against the wall, struggling not to cum just yet. But it was all in vain, and with a loud cry he came down my throat. I greedily drank his potent jock seed, making him whimper as I drained his big dick. When his balls were finally empty I pulled off, grinning.
Brent still leaned against the wall, his hard dick jutting from his strong hips. "You... did you do this?" he asked. I felt a nervous twinge, but then felt my head nodding. "Yeah," I said, a bit sheepishly, "Hope you like it."
"Are you kidding?" the big jock replied, stepping away from the shower wall and toward me. "I've just gained years of gym time in seconds. It's fantastic!" He tensed his thick pecs, grinning, and then went through a series of poses, showing off the body I'd given him. After a minute, he turned to me again. "Can you make me bigger?"
"Bigger!?" I asked, shocked. I'd already made him the most muscular guy in school, bigger even than the strength coach!
"Bigger!" he demanded, stepping toward me again. "Make me huge!"
I had to admit, it was turning me on. I felt the wand under my fingers, in my pocket. I made my wish. Brent stood, looking at me expectantly. His eyes widened suddenly, and a huge grin appeared on his face. His big chest began to rise and fall faster as his breathing quickened.
"Oh yesss..." he groaned as his body swelled. His already big and hard muscles bloating with power. His height increasing, his weight growing as heavy, dense muscle packed itself onto his body. He stepped back, raising his arms into a brutal double biceps pose, chuckling, reveling in his body's growing power. Watching it was exciting, and perhaps a little frightening, which made it that much more exciting all over again. Even Brent's cock and balls were growing - I hadn't specifically wished for that, but it seemed the wand had read deeper into my wish.
At last, the huge jock's growth slowed, then stopped. He was massive. Brent was now six and a half feet tall, and easily 400 pounds of pure, brutal muscle. He looked bloated, but it was all from powerful muscle, with very little fat. He flexed his huge arms admiringly, grinning like a madman. At last he looked down at me, still flexing. His foot-long dick bobbing in front of him, hard and huge. A drop of pre appearing at the tip.