Randomindividual

They have Shisui, Itachi and Faguka as well as tons of high level Sharingan shinobi? Even if! Even if they couldn't win the village wouldn't attack them if they gathered their forces since it would likely cause massive damage to the village. To say that they have 'Such little strength' is a joke. Even Faguka alone with the mengekyo can probs kill Hiruzen.

I sound like a broken record but call him the dark Lord or black wizard. Mysterious man sounds so out of place.

Voldemort. ' Mysterious man' sounds weird but I guess they don't want to call him by his name.

Damn, I just realised they don't like to call him by his name. Nvm

Just say Voldemort instead of mysterious man, it sounds so weird.

"From one moment to another, without any warning, a city was destroyed with unnatural speed." This is a more clear and readable. English is clearly not your first language so I understand but you should try and make the first chapter clear or readers will be confused and flame you in the comments.

So? If Madara and everyone else finds out he's from another world then they can travel to his aswell. thousands of people could die just because the MC led the wrong people back with him. That's just my opinion tho.