NARUTO : Orochimaru

The protagonist Ye Long was unhappy, but inexplicably traveled to another dimension and merged with the soul of a great scientist. From then on, a man named Orochimaru held a grass sword, awakened the blood of Yaqi, controlled the yin and yang escape of immortality, absorbed the core of the world, and also Crazy manufacture of Horcruxes, research into chemical weapons, and embarked on a road of no return that changed his life against the sky and subverted the finale… – Description from MTLNovel Details