With the new invasion mechanics, summoning scrolls, things sounded like they could get interesting. I only have an advy on the island, but I have heard nothing more of the scrolls other than descriptions.
Are they uncommon, or are people just bulking up/afraid to use them right now? It just seems like a fun thing to give them to an advy who can scout monster/undead levels in a region and scroll bomb them. Maybe we'll see them when a war breaks out.