Power of the Titans (Anime)

"What are you? A man? Or a Titan?"

- Kitz Woermann to Eren Jaeger

The Power of the Titans (巨人の力) is the ability which allows for Subjects of Ymir to transform into intelligent Titans known as the Nine Titans. Unlike Pure Titans, those with the Power of the Titans are able to control their form and retain their human intelligence. If a Pure Titan gains the power of the Titans, that Titan will return to being a human. It is often noted that these Titans are far more powerful than regular Titans and oftentimes display appearances and abilities unique to only them.

Transformation
In order to transform, a human with the Titan ability must suffer an injury that draws blood (often self-inflicted) while having a solid goal or belief in mind at the moment of injury. However, being injured by another person is also sufficient. Once the transformation is initiated, a burst of energy is released (usually a bolt of lightning or an explosion), followed by the generation of the Titan body and a release of hot steam. After transformation, the human body rests within the nape of the Titan's neck, the center of control. The human body is also merged with the Titan's flesh inside to varying extents, most frequently on the area of the cheeks below the eyes, rendering them immobile.

If an Intelligent Titan is pushed to its limit, the human will emerge from the nape of its neck, sometimes in a semi-conscious or entirely unconscious state. But if the Titan is not exhausted, then its human form can emerge from the Titan form in full consciousness. In some cases, a human is able to partially emerge from their Titan body without fully leaving the nape.

After the Power of the Titans is used, the area around the emerging human's eyes is temporarily marked by dark lines. The design of the marks appear to vary on some cases depending on which Titan the human is in possession of, as shown by humans who hold the power of the Colossal Titan having more striking marks on their face than the others, resembling the Titan in their possession. The amount of time the human possesses these marks appears to depend on how long, skilled, or overworked they used their Titan forms, ranging from several minutes to several hours.

In some cases, the ability to transform into a Titan is hindered by injuries inflicted on the human body. A human can transform into a Titan with injuries as severe as a missing limb, but only if a previous transformation has not occurred recently. If a human emerges from their Titan form and receives a severe injury, this person cannot transform into a Titan again until said injuries have fully healed.

A Titan's transformation usually causes the destruction of the area in which they have transformed in. However, the Colossal Titan is the only known Titan capable of increasing the blast radius to a larger scale than simply the area in which it is located, in which it usually resembles a nuclear explosion. This power was first seen being used by Bertholdt Hoover during the Battle of Shiganshina District. The blast was seen by the full district of Shiganshina and sent massive waves of energy.

Physiology and abilities
The average height among the transforming Titans is 15 meters, but this can vary greatly, ranging from the 4 meters of the Cart Titan to the 60 meters of the Colossal Titan.

Humans with the Power of the Titans also gain the Titan ability to regenerate and are capable of vastly improved healing abilities, even to the point of regaining lost limbs. However, regeneration from severe injuries, such as lost limbs, can strain their powers and prevent them from transforming for a period of time. It is evident that healing for a Titan's human form takes much longer than that of their Titan form. The time it takes to regenerate appears to depend on the extent of the injury and how focused the individual is on healing that area.

It is also shown that these Titans are not safe from regular Titans, and will be attacked even while transformed.

While not all of the Titan abilities have been identified, each inheritable Titan possesses a unique power. The Colossal Titan has been shown to possess significant control over its body, able to release devastating bursts of steam to ward off enemies or even completely evaporate in seconds. The Armored Titan possesses hardened, armor-like skin covering all but the key areas of movement. The Female Titan is able to call upon Pure Titans with a scream, luring dozens towards her position with little time.

Annie's Female Titan has also been shown to possess the ability to harden her skin to the point of near-indestructibility. She is able to selectively harden regions of her Titan body and even create a hard crystal around her human body, putting her in an apparently-unconscious state with no need for nutrient intake. It seems, however, that not all transformed Titans possess this hardening ability.

Curse of Ymir
Each person who gains the power of the Titans is fated with the "Curse of Ymir" (ユミルの呪い), which limits their lifespan to only 13 years after first acquiring it. During the last years of their life, their body will weaken until they perish. Both Eren Kruger and Uri Reiss were sick and appeared to have aged considerably during their final year.

Transference
The Power of the Titans can be transferred to a new host, should the current host be devoured by a Titan. This allows an ordinary Titan to become human again and possess the Power of the Titans, and inherit one or more of the Nine Titans' abilities as well as the memories of the previous inheritors.

However, according to Rod Reiss, the power of the Titans resides within a human's spinal fluid, meaning that to gain the Titan's power, it is not necessary to eat the entire human, but rather a Titan can simply bite through the spine and ingest said fluid. Titan serums are, in fact, the spinal fluid of Titans, though study of the serums is difficult due to the serum's rapid rate of evaporation upon contact with air.

If an individual with the power of the Titans dies before it can be transferred, the power will be passed on to a baby among the Subjects of Ymir, who is born after the said inheritor's death, regardless of distance or relation to the previous inheritor.

Trivia

 * In Episode 52, the official subs translated 「巨人化能力者たち」 (Kyojin-ka nōryokusha-tachi, lit. "people who possess the ability to transform into giants") as "Titan shifters." That term was a popular fan-made name for humans who have the Power of the Titans before the official subs adopted it.
 * Before Episode 52, the official subs translated it as "human(s) possessing the ability to transform into a Titan."

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