Hriston
Dungeon Master of Middle-earth (He/him)
If nothing else this has got a few of us thinking, though I suspect in my case I will just leave it as the 'hand wave'. Though each class having a cipher I may consider,which means a scroll would be only usable by a particular class as this does make sense to me. I even allow something like if the spell is on a characters spell list but the scroll is created by another class then an Arcana or relevant check could be made to use the scroll. This in my mind implies that the cipher for a spell is similar but not the same for each class but if you know the cipher for one you might be able to break it for another.
My issue with that would be the extra step for the DM in deciding for which class the scroll is intended. In some cases it would be clear cut, like if it belonged to a specific NPC, but at other times a correct answer wouldn't be so apparent and becomes one more thing for the DM to determine.
I didn't make this very clear I even thought that as I was writing it. I guess to me if say Warlock and Wizard shared spells had one cipher and if Sorcerers had another spell which was in common with the other 2 classes it would be a different cipher, meaning from the original post their would be 67 different ciphers. This just didn't make sense to me felt way to 'clunky'. At some stage a Warlock and Wizard had to come up with a cipher usable by those 2 classes alone and then get a Sorcerer in for the next one. Which didn't doesn't seem realistic at all (of course everything else about the game obeys the laws of physics and common sense so why shouldn't this).
I would think of the 67 ciphers as representative of different magical traditions. The six spells shared by warlocks and wizards, for example, have a loose thematic coherence having to do with inflicting debility and/or confinement perhaps by/or opening a conduit to another plane of existence. I can imagine this tradition having been developed by one or a group of spellcasters in the past. It doesn't matter to me what their class(es) might have been. For both warlocks and wizards to then make this tradition, along with its associated mystic cipher, part of their repertoire doesn't require any particular cooperation between members of the two classes, at least not to me.
I like the overall thinking but expect I will just have it running how it does now but will probably discus with my group and see what they think.
Just to be clear, nothing I'm suggesting is intended to change the way spell scrolls are run, but rather it is intended to describe how and why they are run the way they are.