I recall Chandra just sort of catching fire as a kid. How do other notable magic users started their thing?
Do they ever learn completely new disciplines (for a hypothetical example, Chandra learning something that's not fire and fire accessories)?
If your personality changes, do you actually lose power in your old disciplines, or do you just prefer to use your new ones?
I'm thinking about a crossover fanfic where in a character gets the spark, spends almost a decade travelling the planes and learning a bit of magic here and there (all offscreen), before returning home. I just want a fitting and plausible sounding explanation for how they got there.