The Wizard of the Body tradition that went as pupil #23 woke up in their room and walked over to their bathroom mirror. They looked at their mostly unchanged face from last evening, and lifted their giant Z-cup breasts onto the sink for support as they scratched their just as absurdly large scrotum gently. One of the perks of being an adept Body Wizard 23 supposed as they went into their rune pouch they always kept on themselves on one way or another.
Feels like an Anya day 23 felt as they grabbed a few body runes and a few other assorted runes to shape the magic in just the right way. With the magic cast 23 started walking as they changed... They had done this song and dance enough times that what had been disorienting and unbalancing was now just a walk in the park for themselves. Walking on shrinking legs was a little tricky at first, but 23 imagined it as taking a deep step down a staircase without having to worry about falling. 23's balls retreated as they used a few more runes to transform what little clothes they had into a cute dress and robe which shrank with the rest of her body. Which was useful as those giant boobs flattened almost completely. Now in the form of a little girl Body Wizard 23 would seem pretty unassuming if not for her blue robes with the body rune symbol stitched into it as a repeating pattern. 23 looked in a full body mirror to make sure they didn't make any mistakes, and now having assumed the identity of her persona Anya she skipped out the door as she just got enough magic xp to level up.
Most non-magic users were confused with different magic users grouping into different schools. As long as you had the runes and levels you in theory could cast any spell, but it was found that unless you really knew how to cast a spell a certain way... You couldn't get any exceptional effects so many magic users focused on certain schools of magic or even single spells. 23 was adept at the chain of spells that let her transform people with their consent, but they had great proficiency at most body magics... Although most of the time thhe had to practice on Goblins and other NPC's that they could get away with practicing on.
Anya looked around the player markets, and stopped by a chief's stall and got some breakfast pastries which were better than anything she could've gotten in the original world. So light and fluffy and buttery an- *bump* SOME BASTARD BUMPED INTO ANYA AND MADE HER DROP HER PASTERY! Anya looked and saw someone clad in enchanted armor look back and say "Sorry, how can I... Oh you're a body mage, mind if I asked for a little help for quest preparation?"
Anya a little grumpy said "Buy me a bakers dozen of that pastry you made me drop and I'll give you a fair price." Usually the fair price for any transformation was the cost of the runes used for the magic... and then the markup was really whatever the body mage felt like. For instance while 23 used their magic to experience bodily pleasures if someone wanted to abuse their magic for the same thing then either they'd boost the price to something in the tens or hundreds of thousands of gold... or make it more reasonable, and when they tried to change back raise the price and hope any other body wizard would do the same.
"You see I'm doing this quest where I have to beat someone no man can beat," the man who called himself Quester "So I just need to be a woman. What's the price?"
Anya's face contemplated for a second as she was stuffing her face with some great pastries and said "So just a gender flip?"
"...I mean... I was going to finish this by the end of the day and change back... Are there any options?"
"Alright, for a quest like that... I'd consider doing it for 500 gold?"
"Deal!" the energetic Quester exclaimed as he shoved a pile of coins into Anya's hands. Thankfully for some reason the coins vanished into Anya's coin pouch/inventory. Anya then finished her pastery, and reached to her rune pouch as she prepared to cast the spell. The first part of the spell chain she used was mostly just for use in public for theatrics as Quester melted into a pile of goo. Other people would then pay attention wondering what was going on, what would come out of the puddle, or just walk through the puddle which would do nothing but freak some of the other people out. After the single walker was done Anya felt out the proper form of a gender bent Quester... A form started to form out of the puddle that started off kinda stick figure-like, but gained form... Nice, slender in the right ways, pretty... Shit there's still a decent amount of the puddle mass left... Well Quester will probably not be angry for getting a little more padding as Anya forced the rest of the puddle into the chest/ass area. The liquid-like form solidified and textured as Quester's equipment re-equipped onto her new form.
The spell was complete and Quester wobbled a bit and said "Woah... gonna take a bit to get used to this..."
"Well the spell is complete... just find another body wizard if you wanna change back... going out for a stroll." Anya the little girl said and walked away. A couple of people would be wanting to do something similar, but Anya the Body Wizard 23 wasn't really cash strapped or money motivated. She just used an event ring to turn into a pigeon and fly off out of the kingdom gates, and then walk off for adventure... Maybe she'd pick up a quest, meet a new potential friend/enemy, bully some enemy npc's, or do her special torture to some secluded npc's living off somewhere in the world. It all depended on what she found or what found her first.