The Shinigami Side Effect

/Non-mass\ It was obvious you should not use a jutsu that summons the Shinigami without knowing everything that could happen, yet I did. Because I was an Uzumaki, I wasn't sent into its stomach for eternity, but in my thirteen-year-old body, in front of Uchiha Shisui who got me out of the Bloody Mist of Yagura. Now, how much does the Shinigami side effect will change History?