Naruto Uzumaki was a warlord. After the first 12 years of his life he learned the ways of the force. He learned through a holocron a Sith Holocron Sith spells and teachings as well as history of the reconstituted Sith Empire.
He learned it from Ludo kressh and his powers and became a master of Sith magic and spells. He then used his power in the dark side to unite his people and he became a very powerful dark sider.
Considering that Ludo kressh descendants hired here on the planet he had the force thanks to that.
He now however is trained by Darth Sidoius - dark lord of the Sith as the secret weapon of the Sith order.
He is a warlord and now named Darth Umbra - Lord of the shadows.
Darth Sidoius smiled at his new secret apprentice...
It has been a few years since Maul died and he looked for a new apprentice , one that is younger and far more powerful. So he felt a tremor in the force and he found him and trained him in the ways of the force and it lead him to Naruto and now with his training he helped him take over his planet and now he has taught him. He was a natural with the force and powerful and immense with the dark side.
But how did Sidoius find Naruto ...
Flashback ...
Darth Tyranus - dark lord of the Sith has made his way to the planet of ninja and he has sensed a great power. He seen a human male with tan skin and blue eyes as well as yellow spike hair as well. Count Dooku looked on as he was looking for the great power in the force. On the behest of his master he was find and bring him the person.
"So do you want power ? Absolute power ? Power enough to take over this planet ? Power enough to finally bring peace to this warn torn planet ? " the count asked.
"Yes I want power, I want it to become an emperor of the planet " Naruto said.
" then come " Count Dooku said.
What the count wouldn't tell them is that he had some holocrons and scrolls and spells books as well as info on the Sith he could find on the planet.