Hmm.... if they are scroll-based, then the effects, and even whether or not the casting itself is successful to begin with, would be based on the user's spellcasting skill. That could seriously put a crimp in someone's plans if they run into the middle of their hated enemy's realms, read off the scroll, and it fizzles.
Now... which realm has the most skilled spellcaster? Will there be a run on scrolls in order for realms to train up skilled spellcasters? Will any realms outlaw magic and the use of scrolls? Which realm will be the first to regulate scrolls and their use in order to turn it into a realm-based resource, used only at the discretion of the realm leadership? Who will be the first to use it against their own realm?
