"I'm sure you do." Svava chuckles, then begins writing with a fingertip on the bar.

"It works if you suspect who it is already, and you know their name. Not a... True Name, but one close to it. I know Mister Doctor Hannibal Lecter, and that works for this. The runes... they see if who it is matches the name you give. If the person does, you see it."