Chapter 749 - To Kill a Killer

As Batman once said, "If you kill a killer, the number of killers in the world remains the same." There's an obvious flaw in that logic. If you're already a killer, the number of killers would decrease by one.

Thus the only logical solution is to commit mass genocide by killing every killer and then suiciding. After that, the number of killers would be 0... for a few minutes at least.