Dean Frey von Gregory presented the detector for parasitic Zergs for the Emperor to use. It's a little gadget that resembles a camera and a scanner. The scan's outcome would be displayed on a holographic screen. On the holographic display, a human body's outline, the vessel's changing temperature, and the condition of the body will all be readily visible.
Dean Frey von Gregory did not create this device himself. Instead, he obtained it from his personal inventory. The device was originally made by Lord Hei as a toy during their time in the last interstellar world. However, it proved to be ineffective against the Zerg Race on that world, who were too fearful of appearing before Lord Hei as a parasite person. Additionally, the Zergs were mostly outsiders, similar to Lord Hei's group, and thus the device was not useful against them or the other Gods and Goddesses.
