Immortality

is Tengen's innate technique that grants them eternal life.
== Description ==
As implied by its name, Immortality grants the user the ability to prolong their life, effectively granting them the potential for an infinite lifespan. However, this technique is not "de-aging", meaning that the user cannot escape the physical changes brought upon by the process of aging.
Once a user of immortality reaches a certain age, the technique attempts to change bodies by undergoing an "evolution". This process causes the self-awareness and will of the user to cease to exist and they become a shell of their former self as a result. To prevent this, every five hundred years or so the user must merge with a capable "Star Plasma Vessel" and rewrite their body's information. Once the body is refreshed, the cursed technique follows suit and evolution does not occur.
=== Star Plasma Vessels === 
 are young women who possess the requisite potential to refresh Immortality by merging with the user. Some vessels have more potential than others and they can communicate with each other even if one person has already merged with the immortal. The user themselves cannot communicate with those who have become a part of them. 
	
== Usage ==
Tengen has existed since the Nara Period and laid the foundations of what would become the culture surrounding jujutsu sorcery. They have become known as Master Tengen, an immortal hermit who does not interfere with the world. Connected by fate to the Six Eyes and the Star Plasma Vessel, about every five hundred years Tengen must merge with a compatible vessel. The most recent occurrence was in 2006, twelve years prior to the current day. 
Satoru Gojo, the current wielder of the Six Eyes was tasked with escorting the most recent Star Plasma Vessel, Riko Amanai. Jujutsu High feared that Master Tengen's evolution would compromise the barriers protecting the schools, and in the worst-case scenario, cause Tengen to become an enemy to humanity. 
The Time Vessel Association is a that worships the immortal Master Tengen. They believe merging with the Star Plasma Vessel would be impure and hired Toji Fushiguro to assassinate Riko. Toji was successful and prevented the merger. It was initially believed that Tengen stabilized because another vessel may or may not have appeared, but this was not actually the case.
After failing to merge with a Star Plasma Vessel, Tengen's aging accelerated, and their self-awareness diminished, causing them to become "one" with the world. They evolved for the past twelve years and now it is possible for someone other than a Star Plasma Vessel to merge with them. Tengen has become an evolved soul capable of merging with a human and making them something beyond a jujutsu sorcerer. This evolution has caused Tengen to become more cursed spirit than human, making them a prime target for Kenjaku's plan. 
== References ==
== Navigation ==
Category:Innate Techniques
category:Tengen Techniques
fr:Sort d'Immortalité