Even if we don't make diamonds (or other gemstones) for resale, I kinda want to make one that's (a) stupidly valuable and (b) really cheesy.
Say, a double-fist-sized diamond that inside has an intricate and appropriately coloured figure of Mami and Sabrina holding hands
oops
. A little trickier than just pure diamond, but Griefhax should be up to introducing the appropriate impurities for coloured diamond/other.
We can put it on Table-kun and see how long it takes anyone to realise.
My initial reading was that the problem is that there is no problem. Sort of like how some people who win the lottery or something can just implode or become directionless because they have no idea what to do with that much money.
Meguca do generally have to be giving serious consideration to their Seed supply at all times, whether that be Witch hunting or hiring their services out to others or robbery. It gives them focus.
Rin and co have just been told they no longer
have to do
anything. They could just go sit on the couch and watch TV for the next century. No more dangerous Witch fights, no territory disputes, no more travelling around healing people or trading favours, just.... free time. So, now what?
A sudden lack of purpose can quite a problem.
Free time is good.
Nothing but free time is bad.
In short, they need a job/hobby. Extreme flower arranging or something.
Pro bono healing in other cities runs into them being targets for their obviously/suspiciously abundant Seeds, and doing it in mundane hospitals runs into the secrecy of magic thing, but it's possibly an option for Rin+Sakura at least.
Or I could be completely wrong and there's major issue festering there they don't want to talk about. I blame Akiko.