More Jewlery

“It’s a navigator. Very much like your ring, actually. Single use, I’m afraid, but I think you’ll appreciate having it. If there is someone you need to find, for any reason, all you have to do is take something of them and secure it inside. Any sort of tissue sample will do—a drop of blood, a hair, even a fingernail paring. The navigator will show you where that person is and help you chart a path to him. Or her. It’s very effective, as long as your target is not using some rather advanced types of magical concealment. It works best on someone who doesn’t know you’re after them.”

Test of Metal: A Planeswalker Novel (Magic The Gathering: Planeswalker Book 3), Chapter 18