Maybe as you progress through the game, you are able to fight your teacher, and possibly Ambrose!
Maybe after the game is officially released, and you guys add more worlds, you can learn spells that require you to show if you are worthy of such a magnificent spell.
Maybe even, if someone were to reach the end and beat the former Death teacher, Ambrose tells you about a spell called "Elemental Chaos" that pretty much could over kill someone with over 2000 health, but in order to get it you must fight Ambrose himself-alone! He could probably have 10,000 health or more and have EVERY SINGLE spell there is. Plus, he could be the only boss that could use a pixie. Also, they will drop SUPER rare items for that class only. So if you want a super rare fire card/item, you would have to fight the Fire teacher!
Hey, what if it was a rotation thing, where every month a different professor was available to duel? And I'd rather they dropped pets than any useful gear. Something fun.
forget that stuff like staffs. i want them to drop there schools best spell if you win. of course that would mean that they are REALLY REALLY HARD! and a solo thing but it would be worth it for spells
id say that would be cool but id rather if all of the towers had their elemental "god" creature there open and ready for everybody
PS:being a balance student myself i had to fight storm ice and fire tower "gods" and i whipped them without even healing once so maybe them just stronger would make better class bosses