Jon could do anything with his wishing stone, but he still feared it was too dangerous to use directly. But he could use it to create situations, or other devices with safeties.
"I wish that I had a device in front of me with a single button on it. When the button was pushed in, it would grant the next spoken wish, and the wish would be reversed when it was pushed in again, as if it never happened. Only the person who used it and anyone they specified would remember what happened."
Such a device would allow him to fool around, and ultimately, undo everything back to the point he'd made the wish. It appeared in his hand. "I dub you Wish Box," he said, to no one in particular.
