"I wish that you would steal money for me then," the mugger said. That way, the mugger didn't have to get in trouble if Jon messed up and got caught. He'd be gone in a blink of an eye, thanks to his newest possession. But why didn't he just wish for money, instead? Well, because he's not really that smart. If he were, do you think he'd be robbing people on the street?
The stone glowed and Jon felt different. He wanted to steal. And he felt like he was good at doing it, even though he had never done it before.
"Well? What are you waiting for?" he asked Jon.
"Don't worry, boss. I know the perfect place to hit next."
"Oh yeah? Where?"
Jon smiled slyly and told the mugger what he wanted to rob.