Nick looked around trying to find a way to escape from that cave or, at least, to get free from Nagini's influence that made him and other 9 boys immobile like statues. It wasn't easy because that place was pretty dark and Nagini had lightened only a few places with old fashioned oil lamps.
In fact, despite its creepiness that cave looked mysterious and fascinating. If he wasn't trapped in there, Nick would be excited to explore it, well, except for that chamber. He didn't end up as a pig or a snake.
He looked up and noticed that the hole where they came was too far away. It was a miracle that they weren't hurt. That pile of hay was very helpful. Hold on a sec, Nick got an idea... The oil lamp, the hay... He could make a fire and Nagini would be obligated to take them out. He won't risk his life after all.
Now that Nick has a plan, he need a way to do it. He desperately tried to move but his whole body felt like if he was going through anesthesia. He can't move completely, but at least he can try to move a little. A finger at the time. He focused on his left pinkie. It didn't move... He tried again... Nope.
"This kid seems promising." Nagini said as he touched a blond boy's face. He didn't look older than 10 yrs. He skinny pale body was only covered by the small purple speedo he was wearing. Nagini played with that kid for a while, touching his bare chest, his thin arms and his messy hair. The kid didn't move at all.
After several minutes toying with that kid, Nagini finally pushed him inside the chamber. Like the other prepubescent boys, at the moment he crossed the gate he recovered his senses and immediately started to panic and cry. Nick can't bear seeing that kid poor fate as he started to grow up.
He went through an instant puberty just like the others. His height shot up drastically. His thin arms and legs got manly definition and his hands and feet got bigger as well. The poor boy kept crying as his high pitch turned deeper and manlier. Nick didn't want to think about it but he can't ignore the growing bulge that was swelling inside his speedo. It was so big that the fabric stretched to its limit and half of his dick and his whole bushy crotch were now visible.
His cock wasn't hard but it was still so big and leaked so much precum that gooey drops start to fall through the stretched purple fabric. That cute little boy had turned into a hideous grown man that looked grotesque wearing such small clothing that didn't fit him at all.
A few seconds passed and Nagini thought for an instant that he had found the right one. However, the newly grown blonde guy started to cry in pain. His eyes suddenly popped out and he started to sweat a lot. But, if you looked carefully, it wasn't a regular sweat, it was gooey like mucus. That weird substance covered him totally until his skin looked completely different. He kneeled and Nick noticed that his legs had started to merge together until they became a big shapeless mass.
With his mouth wide open, Nick watched the guy shrinking until he was as small as a mouse. He kept changing until Nick can't distinguish his humanity anymore. A tiny and nasty slug was slowly moving through the chamber. Nick was horrified but Nagini was just disappointed.
"Oh... And I thought for a moment that he was the right one..." He said as he put a hand on his chin. "Well, it's not my first disappointment... Let's move on!"
While Nagini was thinking who will be his next victim, Nick had managed to move his pinky. He was so glad that he didn't notice that Nagini was looking at him.