"Come on." Mike led the disguised elf back out the front of the stable. Several of the townspeople were surprised to see him looking the same and gave Mike some suspicious looks. Mike winked and stuck a thumb in his mouth when Brian wasn't looking. That got some nod and grins.
There were some young children playing off to the side, making mud pies and chasing each other. None looked older than 7 or 8, while the youngest was perhaps 3. Brian watched the kids playing and wrinkled his nose. They were filthy and naked, probably crawling with lice. And as he watched, one of the old boys pissed in the very mud they were playing in!
Mike angled over to the kids, with Brian following reluctantly. He waved to the boy who had just pissed, and knew his name as soon as he needed it. "Isaac! Come here. This 'kid' is looking for his centaur freind."
Isaac grinned a buck-toothed smile and stuck out a muck-covered hand in greeting. "Hi!"
Brian stared at the hand a moment, then winced as he took it and shook gingerly. Only to have the boy grab him and yank hard. The sudden tug, combined with a push from Mike, sent the elf falling into the muck. All of the kids pounced on him with happy shouts, and though he was bigger, there were enough of them to keep him pinned. They tugged and pulled at his clothing, and despite his struggles, soon had him as naked as they were.
Mike laughed as the two older boys wrestled with Brian, getting him as filthy as they were. It was more than just the muck. Brian's skin darkened with ingrained grime, his hair got matted and full of lice, and as he got dirtier, he got younger. His ears had rounded out, and insetad of an elf disguised as a human boy, Brian had become a real boy, now no more than 7 and still shrinking.
Brian struggled to get free, but the now-older 8 year-old pulled him into his lap and hugged him. "Yeah, you're my dumb little brother. My little little brother."
Brian cried out, pulling futiley at his captor's arms. He was 5 now, and his features were changing. He looked like the boy holding him, just a younger version. Brian started to piss uncontrollably, unable to stop, and tears filled his eyes. He was scared and confused. Four years old, and he stuck his thumb in his mouth and sobbed. The older boy laughed and rubbed Brian's head. The confusion thickened, and the now 3-year-old Brian stopped crying because he couldn't remember what was wrong. His memories were fading, and more seriously, so was his intelligence. When his big brother finally let him struggle to unsteady legs, he was still 3 years old physically. But his mind had been dulled, and when Brian grew up again this time he was be a happy laborer, mucking stalls or plowing fields for the rest of his life.