Mike watched Harriet do her magic and didn't speak to allow her to concentrate. He stepped forward when the illusion was brought up, watching Benjamin and the shadowy figure, and how Benjamin was suddenly taken by it. 
"Maybe..." he began and paused. "Our magic isn't really strong, but I did read about some kind of tracking ritual that will allow you to find the whereabouts of a human you know. There should be a table back at the agency with the runes already carved into it, we just need a map and a pendulum kind of thing." Mike turned to Harriet. "Unless you have anything that could work now?"