The new skills in the biography are immortal and used by the Bandit Temple. Its principle is similar to orochimaru's reincarnation, but it has little connection with orochimaru.
When it comes to immortality, the first impression of Naruto fans is that Uncle Snake is not reincarnated, and similar skills are also found in Bo Chuan → corpse-driving technique used by Cheng Zheng Temple, the leader of the bandit group:
The principle of surgery is to swallow someone else's brain alive to gain their memory, become their appearance and seize their vitality at the same time.
Although it seems that the skill effect is fatalistic, it is actually similar to the principle of orochimaru's reincarnation, and each has its own strengths. There is no evidence that orochimaru developed this skill. The difference between them is obvious.
Orochimaru's ghost seal needs to erode the other person's soul to seize control of the target body. This process is risky. There may be cases in which orochimaru's possession is unsuccessful (for example, Sasuke is an example), and the use of this skill has a cooling-off period, so it cannot be used continuously. It is set for skill balance. Judging from the ability and characteristics, orochimaru's reincarnation is much more complicated than the steps of using the above-mentioned corpse double body technique.
Although the use of Bo Chuan's corpse is outstanding, its use is still limited: whether it can devour the brain of the target individual, if this process cannot be completed, the subsequent process of copying memory, simulating appearance and seizing vitality cannot be realized. In the plot, the objects of Cheng Zheng Temple are weak opponents, such as the son of fire nation and the housekeeper, who are all helpless roles. When it comes to the powerful role of individuals, it is difficult for Cheng Zheng Temple to exert its personal abilities.
However, orochimaru's ability in communication has been maintained at a high level, and he still has a cooperative relationship with Muye Village. It is impossible to make a move that threatens the relationship between Konoha Village and the country of fire. With the threat of the external wooden clan, Uncle Snake will not teach this powerful forbidden art to ordinary characters.
The purpose of using corpse doppelganger in Cheng Zheng Temple is to seize the actual control of fire nation. Once successful, it will be difficult for orochimaru to obtain enough research resources, so it is impossible to hand over this powerful forbidden art to the role that threatens the original pattern.
As mentioned earlier, the cooperation between orochimaru and Mu Ye Village is mutually beneficial. Orochimaru provides technical support for the research, and Mu Ye Village provides resource support for orochimaru. The financial allocation of Muye Village is actually controlled by fire nation. Therefore, in order to maintain a relatively stable research environment and obtain sufficient research resources, orochimaru does not want to change the pattern of the ninja world.
The purpose of Cheng Zheng Temple is to replace the original name of fire nation and change the original social relationship and social structure by using the technology of corpse and body, so that the original support relationship for ninja may not be maintained. In this case, it is impossible for orochimaru to support the action of Cheng Zheng Temple.
So the skills used in the plot were not developed by orochimaru. In fact, in the later period, orochimaru further perfected the skills related to longevity. As long as the relationship with Konoha remains stable, orochimaru can continue to promote various technical research, so it will not destroy the original ruling system of fire nation.
As for Cheng Zheng Temple, it is easy to know orochimaru. Orochimaru's reputation has a long history, so basically people in the society know about orochimaru to a greater or lesser extent, but it doesn't mean that knowing orochimaru must have a direct connection with orochimaru. The main function of this product is to draw out the main villain group → shell organization in Bo Chuan. In order to prevent the world from being controlled again, orochimaru once prevented the shell from being copied.
The intercolumn cells used by shell tissue to replicate the sacred tree were stolen from the laboratory in orochimaru, and the contradiction between the two sides is very prominent. Besides, the character who uses the corpse avatar technology does not belong to the shell casing. Stop. In fact, the technology of corpse doppelganger is not directly related to orochimaru, and orochimaru is also a self-cultivation in Bo Biography, obsessed with studying various technologies, and has little demand for what power he wants to control Muye Village.