After all, it was somewhat embarrassing.
In the following days, Duanmu Huai regained some leisure time. Although he was a Judge and also the ruler of Arkham City, most matters were handled by others. Duanmu Huai only needed to review reports and affix his seal; he didn't need to intervene unless it was something particularly troublesome.
As for that black bead, it was behaving itself, lying quietly in Duanmu Huai's inventory, appearing to be useless—a true possibility?
Duanmu Huai remembered that similar incidents had occurred more than once in the game. For instance, a quest might involve expelling a Demon, requiring players to find a Sacred Book and then arrange an Array according to the book to expel the Demon—this being the standard procedure.
However, some ruthless players, too lazy to set up the Array, would simply confront and kill the Demon directly.