Sub-zero sighed and looked over at Tanja "This is the reason why we say this tourament isn't to be taken lightly. I know how good you are but this between life and death, if you do not go to kill you will be kill. I not saying you can't do that but the world become much darker once you kill someone for the first time." He thinks back to the time where he had to kill someone for the first time. As a ninja you prepare in stealth and killing quietly but it's a different story when you see them looking at you as they die and to see they life fade away changes you, he doesn't want his sister to see that dark side of it.