On an unremarkable day, in an unremarkable desk drawer, where nothing like it was before, there is now a small, intricate golden ring with a brown gem set into it. It doesn't appear with a flash of light or any kind of magical resonance, though it is faintly magical. Just... One moment nothing, the next, there.
Someone will find it sooner or later. They'll make wishes. He'll grant them. That's how it goes. Forever.