He feels his chest push out beneath his shirt, It keeps growing and as the shirt expands out the buttons weary ever so faster. Ty let out a groan as the buttons flew off the shirt, and his chest was released from the prison which was keeping him back, He continued to grow bigger and bigger, his pecs floating in front of him like two hanging rocks of a cliff face.
His legs, grew through the leather trousers, ripping them and making a satisfying zip noise as the elastic snapped. He didn't know if it would stop, but to be fair he didn't want it to stop.
He felt his crotch expand as well, his trousers sheathed of his growing body and he was standing there now only in his pants, he could see in the mirror this jock which kept growing and growing. A muscle stud which seemed to hulk out in front of the reflected light.
However suddenly he felt this sensation float through his mind, In fact a lot of sensations going on at once, Like a foul stench had corrupted his brain. He felt this feeling to kill.
He tried to digress the feeling away with the presentation of his body but that didn't seem to falter the appeal he felt just now. He wanted to kill, for strength or wisdom he didn't know. But the thing he did know was that the feeling was growing and he had to stop it as well as this transformation.
He didn't want to stop the change so he decided to conceal it instead. He looked in his mirror and asked for a way to conceal his appearance and to stop the change. Suddenly his t-shirt and trousers grow back onto him. And then he shrank back down to his usual younger self.
He was curious why that sensation happened did this mean that his transformation came with a cost. Suddenly a glow protruded out of his arm and a band wrapped around it glowing with it's own core. He knew then that if he took this off he will change again, so covering it up with his sleeve he walks back downstairs and makes a progression in what he would do next.