Titan injection (Anime)

A Titan injection (巨人の注射) is a mysterious item which appears to be capable of transforming humans into Titans.

Uses
The serum is used to turn humans into Titans shortly after they are injected followed by a sudden flash of light.

History
Over sixty years ago, a cult was discovered by a force of authorities, and the man who gave "Ymir" her name claimed she had deceived him. Ymir chose to abide by her given name hoping to save the other members of the cult, but this proved fruitless and she was arrested with the other cultists. After being paraded around town and stoned by angry citizens, the cultists were taken to a remote borderline. Despite Ymir's pleas for mercy, she and the other cultists were transformed into Titans by the use of an injection.

The Reiss family used the Titan injection to pass down the power of the Founding Titan through the generations. This practice had existed since the raising of the Walls. It saw Uri Reiss inherit the power from his father and, in 842, Frieda Reiss inherit it from him in turn.

The Fall of Shiganshina arc
After the fall of Wall Maria, Eren briefly sees visions of his father Grisha Jaeger forcing him to receive some sort of injection. The injection turned Eren into a Titan who then devoured Grisha.

The Struggle for Trost arc
When cornered by the Trost District Garrison concerning his newfound Titan power, Eren suddenly recalls the moment when his father met him in the forest after the fall of Shiganshina. Insisting that Eren must return to the basement of their home, Grisha gave Eren an injection which he said would damage his memory and grant him a new ability. Furthermore, his father claimed that "their memories" would help Eren in learning how to use his new power.

The Uprising arc
In the Underground Chapel, Rod Reiss prepares to use an injection on his illegitimate daughter Historia. Upon seeing the syringe for the Titan injection, Eren begins wildly struggling against his chains, recognizing it as the kind his father had given him five years ago. Rod attempts to influence Historia into taking the injection and devouring Eren, however, after much contemplation, Historia rejects this plan and shatters the syringe. As she begins freeing Eren from his chains, Rod desperately licks the exposed serum, becoming a monstrous Pure Titan.

Levi later finds a heavily wounded Kenny Ackermann leaning against a tree and observes the man's injuries have left him on the verge of death. Kenny responds by smugly revealing that he has a Titan injection, which could allow him to save himself. However, Kenny does not use it on himself. As a final gift, Kenny decides to give Levi the Titan injection.

Dhalis Zachary meets with Dot Pyxis, Erwin Smith, and two of his Scouts to discuss the syringe left behind by Kenny Ackermann. Hange Zoë explains that its contents seem to originate from some sort of human bodily fluid, but it evaporates when exposed to open air, making it difficult to study. Hange suspects that whoever made this had access to a higher level of technology than they do. Since they cannot tamper it without ruining it, Pyxis suggests they use it for their current objective, and the syringe is entrusted to Levi Ackermann.

Return to Shiganshina arc
The injection given to Levi later becomes a subject of conflict as both Armin Arlelt and Erwin Smith are brought to him on the brink of death. Ultimately, Levi chooses to save Armin with the injection, and Armin's Pure Titan consumes Bertholdt Hoover, the Colossal Titan, and Armin inherits the Power of the Titans.

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pt-br:Injeção de Titã (Anime)