"If you kill a killer, the number of killers in the world remains the same."
Each time you kill more than once a day, a person closest to you will slowly lose themselves to an overwhelming desire for darkness. The mind twists, contorts, and warps, with the sudden and uncontrollable urge to end your life. They turn into murderous and tortured individuals, seeking only to inflict pain and suffering upon those around them, directing their special hatred towards you. The corruption spreads with each life you take, and another close to you becomes a deranged and malevolent creature. They become unrecognizable, a twisted shell of their former selves, hell-bent on causing as much misery as possible.