Naruto World with a Simulation System

Author's words: I am not recreating the naruto world instead I am taking it as a base to write the story. if you want to read a simple recreations then read other fan fictions. also there are similar worlds to naruto where aliens comes to drain the vitality of their planet just like otsutsuki clan, like nitro in toriko world, galactus in marvel world, transformers in transformers world.... I am going to use these are continuation where he takes his people along to other world for conquest.  -------------- An old assassin was sought out by his own son and killed him to get the power of the head of the international assassin’s organization in to his hands. “Old man your skills are becoming rusty these days and you were killed using this simple trick. Are you really the greatest assassin in the world? From now on I am the greatest assassin in the world.” “Hahahaha” But suddenly the old man started to laugh loudly. “Son, you should know in your heart that did I really tried to avoid being killed by you. It is just that I am bored by this world. Well there are beauties but I am not young any more. So I wanted to leave this world peacefully. In order to let you inherit the throne of my assassin’s organization, I pulled some strings to make you come here and kill me. You will gain prestige and I will rest in peace. Hahahaha……….. Son before I go I will give you a final advice. ‘Don’t fall into this kind of silly traps and try to kill someone you cannot.’ ‘The assassin is called assassin, not because he can kill but kill the person without the knowledge of the other party by any means.’ Ghouf, Ghouf (Sever coughing with blood in the mouth) Well my times are up and it is a good last game. Good bye my son, Also don’t die early and disturb me on the other side. Hahaha……. (Laugh and silence)” The old assassin died sitting majestically on the thrown leaving his son standing like a clown in the silent hall. “F*** that old man, He even played with me before his death. Sigh” …………………..