Phil felt sick to his stomach while his legs shook and gave way. Dropping to his knees, he could not understand what was happening to him or why. His muscle began to seize up which only tightened the grip of the medallion which was glowing a deep green.
He fell forward on his hands as his body ached and cracked with a growing force outside of his control.
"What's happening... to..." Before he could finish his throat was stifled by a twitch of pain down his spine. Looking down he watched his fingers elongate and nails darken. Hairs, dark brown, began to erupt from the back of his hands which met with more hairs poking out from his sleeves. The feelings even crept up his face and his ears pulled up his head and stretched out.
His head was pulled to the side as his ears became less human and more like those of a rodent. He could see long hairs- whiskers- popping out of his cheeks while his lower lip was being clamped down on by a growing pair of front teeth.
Phil tried to close his eyes but could not manage to, instead his head flopped down and looking back under his body. His legs were growing and his boots, once rugged hiking boots, were being ripped apart from the inside as Phil's feet grew longer and hairer. Just then another twitch down his back but this time it was followed by a massive shock.
Phil's new rat tail grew to a length of nearly four feet in only ten seconds and tore his pants to shreds when it came out. The tatters of his nylon pants fell to the ground and revealed how foreign his body was becoming- thighs larger now and feet not unlike his hands, all covered with a coarse brown hair. His testicles were larger now and covered in fur too while his penis, erect from the increased blood flow through his body, was changed with every heart beat; becoming larger and more red.
Phil wanted it all to stop. He wanted his old body back and he wanted to be back where everything was normal. Despite this he had to watch in horror as his human face bid him farewell. His nose pushed away from his body and into that of a muzzle of a rat and as strength and control finally returned to him, Phil stood up and allowed the last bits of clothing, and his backpack, to fall to the ground around him.
Where Phil the man once stood was now a creature mixed between a rat and a human.