This is an acorn of mass destruction. It’s stored in a small box with room for six but only containing the one.
A strange, mystical box, with many rumours attached, that does not want to reveal its secret…
Historicly, we have had plenty of rl groups like the Taliban and the Puritans who supressed anything which was in any way fun. What if there was some group that was the opposite? (which in time would cause problems of it's own for the civilians under their control.)