A rather absurd thought that makes me grin deviously, the Negima story takes place in the Nasu-verse, or rather with Nasu-style magick.
Shit would definitely play out differently, also none of this "ermine" crap for if he lets magic get out to his students. This also makes Mahora one of the biggest secrets in plane sight you can find, gods the security there would be murder,
literally.
And this Magister Magus stuff... considering the general rules Asuna wouldn't even contactable because she's just THAT immune to magic, how that worked in Nagima cannon either I don't get - loop hole.
The rest of the class, or at least the vast majority would also be in on it. hell just about every demon-hunting family in Japan would be attending and those guys can do some scary shit, never mind the Shinmei-ryu would end up being far more hardass about their rules as a result.
A lot of the girls would turn out differently, Evangeline for instance is a fucking
dead apostle that's no joke, loli bodysize aside. I dunno maybe she's actually one of the weaker Dead Apostles and since the church is just so fanatical and can send out Ciel for anything they can't take normally I can see her making a deal with the Dean. She helps keep Mahora's secrets safe and they keep her hidden/protected from the church. its the only way it COULD go down.
Nadoka, for the amount of power she supposedly has in her I'm sorry but there's just no way she's NOT trained, not in this setting. I could see her as the ultimate pacifist though, might even have herself sealed- which is a huge mistake.
Setsuna should stay the same, just her mannerisms should seem a little... off. She's trying to be human though, for a half-breed she's doing remarkably well. However, she's a not entirely controllable element so I could easily see the other demon-hunting families with standing order to take her out if Setsuna should get out of control. I'm thinking the Narutaki twins and Kaede are the ones watching out for that.
Fei Ku would be a master of Kokyuu and Hohou (or, Breathing and Walking) which for someone her age is downright terrifying.
Lengshen Chao is a doozy, she would HAVE to be a user of the 5th true magic, time travel. She's also responsible for the making of Chachamaru which quite literally does the impossible and combines magic and science, genius wouldn't even begin to cut it to describe this girl.
Mana Tatsumiya though sets me on edge, she's have to be a magus and would have to have the same or similar mystic code as Emiya Kiristugu, hell I wouldn't be surprised if she had dug up his grave and taken his old mystic code for herself!
And then there's Yue a first generation magus who's trying to run with the big leagues and I honestly don't know how long she's would actually last without getting herself killed. That she'd be able to advance as FAST as she does shows HUGE potential that's been completely looked over.
And then there's Negi boya himself, I honestly can't see him being completely the same as cannon personality wise. Oh sure he'd make sure to twist memories before killing someone to hide magecraft but this is the child protegee that eventually grows up to have LENGSHEN CHAO as his heir. And I can't even begin to actually calculate just how dangerius this kid is going to grow up to be. He's being taught by a Dead Apostle -might even end up one- he's looks like he's also going to master Kokyuu and Hohou faster than even Fei Ku does, and he grows up to be a
magus killer who has a kid who is somehow an even greater mastery of the 5th magic than even Aoko Aozaki who invented it! And the biggest icing on the cake of all this, Negi doesn't have anything left over from his father but a single mystic code (the staff) that allows him to fly, THAT'S IT for anyone else who knows how significant that is you know what I'm getting at here. For those of you missing it, most magi put all their efforts into passable Thaumaturgical Crest, to put it simply-
typemoon wiki said:
are the most important treasure of a lineage of magi. Engraved on the body like a magic circle, Magic Circuits that were given a more stable form in order to act as an archive of thaumaturgical knowledge. At some point of the magusÆ life, he will forge some of his own Magic Circuits into the Crest, store all spells that he learned in life and then pass it down to his successor. As the process repeats itself with each new generation, the older a lineage is the greater the number of Circuits forming the Crest and increases the amount of knowledge inside it. It is the duty of any heir of a family of magi to successfully expand and pass down the Crest to the next generation.
As the complexity of the Crest increases with each new generation, the spells stored inside them become more stable and easier to activate. As long as the Crest is completely integrated with the magus body, he will be able to cast any spell stored inside of it, even if he himself never had the chance to learn it properly. All he has to do is to activate the Crest just like he would do to a normal Circuit (by running prana inside of it), find the spell stored inside and activate it with its relevant incantation and thaumaturgical process. Furthermore, it is possible to use it to support the magus regular spellcasting and, whenever the magus gets heavily injured, the Crest is capable of keeping him alive for as long as there is still prana inside his body. Location of the Crest varies: Rin Tohsaka has hers on her left arm, while Kiritsugu Emiya had his on his back.
And as Broken as Negi obviously is in this setting I would STILL read it.