The Shades trick people into displacing their souls with promises like eternal life. Once the soul is displaced however the Shade moves in and takes control of the body. The souls that were displaced become lost souls and are hunted and devoured by Incubi
. They are also destroyed an d used up forever in experiments by Dr. Trouvaille.
The Shade try to take over bodies of the rich powerful and young and then use these host to lure more victims for the shades to take over. The Ghost
own sister Margo Cameron
was taken over by the Shade and she became a lost soul while her body was taken over by a shade that called the new combination of Margo's body and the Shade Spirit Silhouette.