These diabolical instruments are used by practitioners of Voodoo, known as a Houngan, to enact curses upon and to control their victims. Constructed in the likeness of the victim they grow in power the closer the likeness can be made. This is achieved by placing hairs, nail clippings or other samples of the victim within the doll. The resulting symmetry between doll and target allows the Houngan to enact his evil will as he sees fit.