[...is this gonna be another Waver Velvet and does he want to disappoint himself

eh, yolo]

Ah, no --- it's really that there's just been a system of inheritance developed that influences it, I suppose. All established mage families have what are known as Magic Crests, which contain the sum of the magical knowledge of all the previous bearers and are generally passed on from parent to child. In essence, it makes it easier and more efficient to achieve real progress --- after all, if you don't have to spend the better part of your life re-learning all the secrets and spells your ancestors have figured out, then you can get on to making new discoveries, can't you?

Of course, there are plenty of individuals with the talent born to those who don't, and they easily could prove be the originators of their family's crest. It's really something you have to commit to past your own lifetime, though... but anyone who's really cut out to be a mage has already accepted that.

[Or you could win the Magic Lottery and kill Servants because your deep, ingrained survivor's guilt gave you a cool superpower.

That works too.]

That is something I've been wondering... I'm really thankful that there are plenty of neutral spaces where that would be a possibility, honestly.