What if a person with a dark past was born in Naruto Uzumaki's body? Isaac Foster was a child who was sold by his abusive parents to slave traders.After escaping, he became a mercenary but was betrayed by the organization he worked for.But Isaac knew about their betrayal. So he planted bombs where he was. Damn them if I fall you will fall with me you fuckers I pressed the detonator boom Then I found myself in a cell and I was in the body of a little 10 year old child.It turns out I was in Naruto Uzumaki's body. 
op mc
Note this Naruto is different from its counterpart from the original story in that This Naruto is cruel and merciless towards his enemies.Toke no Jutsu didn't use bullshit.He will make everyone who had a hand in his suffering pay a heavy price. Obito Uchiha Danzo, the Third Hokage, and Jiraiya and hind leaf village
dark mc 
op mc
ruthless mc 
no harem 
1st warold naruto 
2st 7ds
3st one piece

Chapter 1 - chapter 0