How would you handle a Wizard learning spells outside of leveling up?
Say the Wizard in your game enjoys exploring old ruins and libraries, studying ancient (and some times forbidden) magics. How would you let the player roll play their character learning all these spells, without limiting them to only being able to take one while leveling up?
If a character’s goal is to learn all the magic in the world, it doesn’t make sense for them to only know 13 spells or whatever.