Benjamin Olson
Hero
My own approach is generally to just say that the first few spells they learn on level up are ones that were already in their spellbook but that they just hadn't mastered yet. After level 5 or so I probably would say it is time for them to have to buy inks ahead of time for those spells if I was enforcing magic ink rules which I usually don't.
I always found the whole idea of magic ink (with spells somehow always using up the same amount per level) to be mostly silly, introduced for mechanical reasons rather than lore ones, and unnecessary. There is very little need to limit wizard spell copying with money because the DM already controls access to finding spells in the first place, as well as components for some of those spells. Even for free spells the DM controls access to level-up. Adding in the DM also needing to give them money just seems like one more form of DM power rationing to pick on one particular class.
I always found the whole idea of magic ink (with spells somehow always using up the same amount per level) to be mostly silly, introduced for mechanical reasons rather than lore ones, and unnecessary. There is very little need to limit wizard spell copying with money because the DM already controls access to finding spells in the first place, as well as components for some of those spells. Even for free spells the DM controls access to level-up. Adding in the DM also needing to give them money just seems like one more form of DM power rationing to pick on one particular class.