The first mare ambled over, glossy black and huge. She whickered at him, then laid her ears back and snapped her teeth at the smaller brown mare to warn the competition off. She was obviously ready for another round, and to Mike's amazement, so was he.
Brian eyed the erection that was forming yet again under Mike's belly and sighed. "Guess Tye was right. I hope you keep some of your intelligence."
The centaur was going to object, saying that he felt fine, but the mare's need was overpowering. Even so, he managed to draw out the mating this time. Mike rubbed against her, using his hands to rub her neck and back, and then slid his fingers down her rump and over the swollen black lips that clenched and relaxed several times. A real stallion would use lips and muzzle for all of this, but he was making do pretty well.
Dar chuckled as he watched, and even Brian was fascinated. Mike's skin kept getting darker and faint shadows of hair were spreading across what human skin remained. The elf stared wide-eyed. "Magic. Real magic. This is so amazing!"
Mike heard the elf, and managed to give his friend a quick grin. "Jealous?" The sensations were incredible - he felt more than just his own erection and the mare's desire - the actual transformation itself was intensely pleasurable. He was becoming more aware of his body every second, skin changing to fur-covered hide. His arms were very small and weak now, but awareness of the massive Shire body below them was more than compensation.
"Yeah." Brian had to grin back. "This elf change was a 'poof' thing. And I'm not all that different from what I was before. You get to experience a real transformation!"
Mike started to answer, but shuddered as desire rippled through him again. His cock arched under his belly, and it felt like his testicles were swollen into grapefruit. The mare dropped her head and squatted slightly, ready to receive him.
As the changing centaur began to shift backwards for the mounting that would take him the rest of the way to being a Shire Stallion, Dar draped an arm around Brian's shoulders and pulled him close to the mare's side. "If you want to experience some real magic, I can help you out. Your buddy will be an adult horse. You could experience growing up as a foal. You have to decide pretty quick, though. It needs to be done before he lets loose with that load."
"Be foal?" Brian was incredulous, but then again, his friend was rapidly becoming a Shire stallion. He remembered seeing colts and fillies romping in fields. That sounded like fun. "Would I keep my memories and intelligence? I want to still be me."
Dar chuckled. "Well, mostly, at least when you are old enough to be on your own again. Like your buddy there, an incredibly smart and amazing black Shire." He suddenly pulled Brian back as Mike suddenly twisted and slid over the mare's back in preparation for entry. "Oh-oh. Time's up."