The audience murmured, some calling out different suggestions. In the fifth row, a teenager shouted "Make him a brood mare!"
Madame Illusia focused her attention on him. He was with several other boys and they all seemed to think the idea was a good one. They started chanting "Mare!"
Madame Illusia raised an eyebrow and pointed at the one who had shouted. The audience quieted. "So you believe we need a mare?"
The boy tried to give her a Who me? look, but his friends were urging him on. He stood and said "Yeah, a nice big brood mare would be funny. Let some stud shove something like that in him!" He pointed at the huge equine equipment that was still hardening below Brian's barrel.
She smiled and waved for the boy to join her. "Come on stage young man, and you can help me make a mare."
With a little more urging from his friends, he joined the sorceress on the stage. He was a slight, short teenager with a permanent smirk on his face below big blue eyes and scruffy brown hair. He was dressed in the typical teenaged style of the day; loose jeans, a dark t-shirt with an anarchy symbol, tennis shoes that looked as though they might fall apart. He jumped a little when the big stallion sniffed at him curiously, making the audience laugh.
"And what is your name, young man?" asked Illusia as the laughter faded.
"Jack," he said. He shuffled his feet a bit as though uncomfortable. The audience fell silent as they noticed that he had suddenly grown inside his clothes. The loose jeans were now above his ankles and tight on him. His t-shirt was stretched by a torso that was heavy with muscle. He did not seem to notice, though.
"And you think we should have a mare on our stage?" she wondered.
"Yeah, like, a mare in heat y'know?" Some in the audience gasped as his clothes suddenly fell away. He was even bigger now. His body was smoothly muscled from head to toe. Other changes were evident too. His neck seemed longer and thicker. His toes had melded together and swollen into hooves. A tail spurted out above his bottom.
"Why should we do that?" wondered the mage.
Jack licked his lips. They felt kind of strange, which the audience knew was due to his mouth and nose stretching out into a muzzle. His ears rose along the sides of his heads and became equine. His eyes darkened and rounded.
"Holy shit!" shouted one of his friends. "Jack--"
Madame Illusia made a funny motion with her hand, and all of his friends fell silent. This was mostly due to their heads suddenly becoming completely equine. Their bodies swelled and burst out of their clothes until they were just as far along as Jack in their transformations.
Jack seemed not to notice the plight of his friends. His big horse-eyes looked off into space as he answered Madame Illusia's question. "Not fair, him getting to be want he wants, y'know? He should pay for it somehow." Jack suddenly whinnied as he dropped to all fours. His hands were now hooves and his arms were forelegs. A coat of golden hair began to cover his body as it swelled into a fully equine form. He uttered his last words as his cock shrank into his body to be replaced by a leathery equine vulva under his tail. "He should make baby horses for the rest of his life, be nothing but a brood mare!"
Neighing mixed with shocked noises from the audience as the four teenagers were replaced by four beautiful Clydesdale mares. The other three milled about near the stage while Jack trembled near Madame Illusia. She reached up to pat his -- or rather her muzzle and told him loudly, "Instant karma, Jack. Or put another way, judge not lest ye be judged. I agree that Brian needs to pay for his transformation with plenty of foals. Now he will be able to do that with some help from you and your friends -- Brian's herd!"
Jack did not hear the last few words clearly. She grunted as a weight suddenly landed on her back, and she felt something big and hard poking at her under her new tail. Even worse, she felt an answering warmth well up inside her and thick liquid coating her new nether lips. She stretched her neck and neighed in delight as Brian's massive cock slid into her depths and the new stallion claimed his first mare.