Jewlery

She took it from my hand. “Jewelry? Are you sure it’s time to take our relationship to that level?”

“You can wear that on your thumb—or, I suppose, given the size of your hands, on your fourth finger.”

“What’s it do?”

“It’s a locator, that’s all. When I’m done, I’ll signal. You’ll know it’s me because the ring will light up and tingle. It will direct you to wherever I am. It’s etherium; it’ll never run out of power.”

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