Chōwagan

is a powerful and rare dōjutsu that has first appeared within Eihei Uzumaki, a descendant of the Raido family. The eye itself is distinguished by it's royal purple or violet coloring on the surrounding eye's surface, with a matching pupil and a off white burst situated around that pupil.

Background
As stated by the eye's name, it is a based upon the state of one's spiritual and natural equilibrium, and is considered to be the physically manifested trait of the Uzumaki's life force combined with the unique ocular construction of the Uchiha. In this vein, it is theorized that this eye can be awakened by other Uzumaki and Uchiha hybrids, however someone have hypothesized that one of the parents must possess the Rinnegan. Raido, the father of Eihei did, therefore making this manifestation possible according to that hypothesis. However, this would warrant the addition of Senju blood, making this a merging of the three lines. Thus, this is considered to me an intermediate dōjutsu between the EMS and the Rinnegan. However, do to it being the first known manifestation, the dōjutsu is classified as a Kekkei Mōra.