[@ERode]Probably something of the sort that's revealed through a ritual or an oracle of some sort around the time they're like 10 or so. Likely, children below at least that age can't use magic very well, and their affinities may be shifting and unstable. Plus, y'know, using magic is taxing so it could damage their health if they pushed it too early.

Basically, think of it like one of those handwaves in crummy isekai where you go touch a magic ball and it tells you what your level is/what cheat power you have/whatever. Gives a list of elemental affinities that you're compatible with, and then it's up to you to cultivate those through practice, or you lose them.

[@webboysurf]Also, I really like Nathaniel! Uncertain parentage and noble gossip, plus the whole upstanding honorable prodigy trope is a fun one. I will say, I think this means we may have three Aura users now (taking into account another character that's been discussed with me over PMs) which is a little more than I was expecting? But I can make a plot point out of it so I think it [i]should[/i] work. Plus they've all got different elements so there isn't much overlap.