"Ya know he's not really going to need that now." "Think you could give it to me Christine?"
"What?" Christine mumbled looking very pale. Something about all this size changing transmutation magic and emasculation was awakening some strange desires in her mind--a melange of lust and revelry in her new power as a wizard. She was picturing what those mares and fillies must feel, the knowledge that her shapeshifting magic might just let her know--hell with the right direction to a spell, she could be the stallion too. Something else too, was in the suffering of the now neutered stable boy, himself having stolen and augmented himself with magic, seemed to be titillating. Then Mike's got a new set of immense balls, jiggling with every twitch of his tail or hooves. She could practically taste the musk and sweat on them, if only she could touch them--or better, with magic she could have them. Now Brian is begging her for an upgrade to his slim elf-hood.
Covering her revelry with a quick divination centric, Christine starts focusing on the stable boy's tool box. "I...uh..s-sorry Brian, the runes on these brushes...they're all enchanted. Most of em look like different horse breeds of different genders. One is set for thoroughbred filly, another for gender-flip mule, heat inducer" She picks through the complex array of tools. "Really, a 'sex-able sheep?!'" Sending a quick glare at the pinned stable boy, before noticing a small locked compartment in the bottom of the tool box. With a single word of power the lock pops open and she draws out a small gilded toothbrush looking implement. "This little one here looks rarely used. Oh wow, hold still a second Brian, I think you'll be happy with this one." And with her drow quickness, Christine runs the small bristles along Brian's groin. 'Maybe you'll care to share with me after, or maybe Mike too' she muses. The bright white bristles leave a luminous white streak. "What the hell Ch---oh, ugh" Brian starts, words catching in his throat as the magic flows across his genitals.
"It's for patterning a subject into a prime breeding draft horses, big ones...uh what's the word in English, 'Boulonnais'- elegant heavy horses. But its more than that, it's fecundity and virility enchantments played on top, with a touch of zebra for some reason. Basically according to the aura, this brush will take whatever you have to start multiply it by ten, and make it horse shaped, turn anything into a draft-horse hyper-hung super-stud."
Sure enough, Brian's glowing elf bits are slowly growing like ripening fruit. The slim and meager five inches of elf shaft taut like a drum skin towards the sky, stretching like a rubber band.