The voice of The Dark Lord boomed into the night air as magic seemed to be squeezing her marked wrist, and Hermione noticed that both Draco and Goyle were flinching in pain as he spoke. The Gryffindor realized with a cold shock of terror that The Dark Lord used his Death Eaters as magical conduits, much like any witch or wizard could use their familiar. As she massaged the aching wrist, the pain dissipated from her son and Goyle.