Since Cella needs to hiatus, I’m on my own for this one now! Let’s say that he wound up alone with it for the night and wishes to spare Hermione any harm.

Jon is full of misgivings about the box, but to start with, he makes a wish on it. He wishes to know who will be hurt if he opens it.

Edit: to speed this up, on the second day he will wish to know who will be helped if he opens it.