"Some spirits wish to destroy us but that will never happen. Its a constant battle that we have to endure, and if we loose the world we guard from them will become hell itself. Since essence powers our supernatural abilities we tend to pull that essence from the spirits we destroy as well as consuming it from Loci, like spirits do." Jessica watched her carefully play with the collar, almost curiously. "Usually the other creatures of the night try to leave us alone but there have been incedents."