Mortal: I, Uchiha, Am Just a Talented Person in the Demon Sect.

Ren Cai traveled to the world of Naruto, but landed in a box. When he opened his eyes again, he traveled to the mortal world and became a disciple of the Demon Sect. Thanks to the awakening of the double pupil [Sharingan], one can perform the pupil technique of the Uchiha clan, making a person fall into an illusion. It can also enhance mental strength, insight, and reaction speed, and even awaken special skills such as Amaterasu and Tsukuyomi. However, his strength is limited, so he is not really immortal. Seeing that the world of cultivating immortals was in vain, Ren Cai originally decided to stay in the sect and practice step by step. He would not leave the sect until he had a baby. However, the demon sect knows how to use people and make good use of them, and everyone is a talented person. "I have the same pseudo-spiritual roots as Old Demon Han, but I don't have the little green bottle. It seems that the only way to go is chakra cultivation." How is mana converted into four attributes of chakra? How to convert natural spiritual power into natural chakra? What are the factors that affect the rate at which spiritual roots absorb natural spiritual power? How to avoid the potential danger of petrification caused by the imbalance between one's own chakra and natural chakra? How to maximize the maintenance time of senjutsu chakra? … It wasn't until a few years later, when he saw a group of extremely beautiful Taoist monks, that Ren Cai realized that he had become a new generation of sect old demons.