Christine prepared her spell as Mike stripped the boy down. They were all rather imprssed with the stable boy's package - He looked to have used some of those magic brushes on himself where it counted, for the sexual equipment between his legs was almost black, and had the size, shape, and even the sheath of a donkey or small horse. Given the boy's homely face and scrawney body, it was probably his only way to get girls.
Mike sneered at the boy. "Gave yourself what you took away from me, huh? Well, I'll take yours for mine!"
"OK! I'm ready!" Christine focused on the boy, weaving a pattern in the air with her hands. A pale golden light flickered around the boy, who began to jerk around to free himself. "No! Don't do thi to me!"
The light then shot over to Mike, who was also enclosed in golden light and connected by a single beam to the boy. The centaur looked worried. "Christine, this feels weird. Why are our whole bodies glowing if..."
Christine completed her spell just then, and the glow on both boy and centaur vanished.
The boy looked confused for a moment, and then said ... "if you are only going to exchange our balls?" Then he blinked and stared. "Wait a minute! What happened? Stop him! He's got my body!"
Before the others could react, the huge centaur spun around, knocking the much-smaller elves to the ground, and bolted out of the stall. The tied-up kid yelled. "Christine! Dammit, you just swapped our bodies! I'm stuck as an ugly stable boy!"
Ty appeared in the stable in front of them, grinning. "You have it more right than you know, Mike. Or should I say, Mika? For that is your name now - Mika the stableboy. Unless you catch the centaur and get yourself switched back in 2 hours, you'll be stuck forever here in this world as a dumb, ugly stableboy. Never aging, never changing, and never doing anything but mucking stalls and grooming horses. And when the game is over, that boy in your body will take over your life in the real world!"