Sasuke : Birth Of Blood Demon

After dying in a car accident, a young boy finds himself reincarnated as Sasuke Uchiha in the world of Naruto. However, he soon discovers that he has been given a unique system that allows him to absorb the blood and lifeforce of others in order to improve his abilities.

With this new power, the boy sets out to become the strongest ninja in the world and take revenge on those who wronged him in his past life. He quickly becomes feared by his enemies and respected by his allies, but as he grows stronger, he begins to revel in his own power.

As he continues to absorb the blood and lifeforce of others, the boy realizes that he is becoming more and more like the villainous Orochimaru. But unlike Orochimaru, he has control over his powers and uses them to manipulate those around him.

The boy becomes known as a ruthless and cunning ninja, feared by all who cross him. But deep down, he knows that he is becoming a monster. He struggles to maintain his sanity and control his powers, but the temptation to give into his darker impulses is always there.

In the end, the boy must confront his own inner demons and make a choice: continue down the path of darkness and rule over all as a true villain, or find a way to redeem himself and become a hero in his own right, albeit one who is feared and respected by all.