Shikigan

In truth the Shikigan is not actually a genetic dōjutsu, it is no bloodline limit at all, but rather an ocular juinjutsu. One of the many juinjutsu that were lost after the Kashiri clan’s extinction. It takes a Kashiri themselves to even know of the technique, let alone know how to perform it. In order to place the curse mark on the eye, the user must be an exceptional juinjutsu master, as they will not be able to visibly see the formula or the formulas location. Once placed on the eye, the outer ring of the pupil is replaced with a ring of cursed formula. This formula is permanently activated, and the process is irreversible, which means any mistakes during the application could permanently blind the user. Due to this risk it is considered a Kinjutsu (禁術, lit. “Forbidden Technique), though forbidden arts have never stopped a Kashiri.

Aptly titled the “Calculating Eye” the Shikigan is a purely sensory dōjutsu. Primarily it processes the surrounding environment, taking in every speckle of information it can. It will constantly output formulas for the user to see, working much like a heads-up display. The purpose since it’s inception has always been to analyze the variables and prepare a fūinjutsu formula that best applies to the situation. In this way it will analyze chakra, muscle tension, elemental affinity, air pressure, wind, gravity, trajectory, distance, etc, taking in all data it can to create a fūinjutsu formula and adapt it on the spot, removing the preparation and wait time and allowing the user to instantly apply the most effective formula. However after a century of use Arajio has found the calculating power of the Shikigan can be applied to other uses. It is able to effectively see through genjutsu, instantly recognizing any irregularities in the reality. It’s perceptive power enables the user to see across expansive distances, allowing the user to fight at otherwise impossible distance. With it’s far range of sight and constant calculation the Shikigan grants it’s user a one hundred percent accuracy with projectiles. In hand to hand combat the Shikigan can analyze the patterns of its opponents and the subtle changes in the surroundings to predict the opponent's next move, and will pinpoint their weakest point for a counter-attack.