Chapter 670: Uchiha Gaiden: Late Warring State Era
Middle Warring States Era,
With their newfound visual prowess, the Hagoromo clan steadily rose to power.
Soon, they forged a distinct identity for themselves and truly separated themselves from the brand of the Uchiha branch family.
Genreigan identified itself as a superior Dojutsu, surpassing even the Sharingan and the Byakugan. The ability of the Genreigan to cast an extremely powerful genjutsu and strip the senses of their enemies made it a powerful tool of war.
Even the main family of the Uchiha clan had to recognize its power and extend a friendly gesture to the Hagoromo clan. Thus, the severed relationships between the two clans were restored.
As a friendly gesture, the women of both clans married to man of other clan. This not only maintained their friendly ties and forged familial bonds but also maintained the Uchiha blood among the members of the Hagoromo clan.
The next-generation leader of the Hagoromo clan suggested the inter-clan marriage. It was an effort to maintain a certain level of Uchiha blood among the Hagoromo clan progeny and was secretly suggested by Black Zetsu.
Despite their close relationships, the Hagoromo clan closely guarded the secret of their 'Dojutsu', never revealing its true nature to outsiders. Only a few elders were aware of the secret and even then, only the current generation of clan leaders knew the formula for the 'Bloodline Pill'.
The Uchiha clan tried to probe the secret through overt and covert methods, but was always disappointed. The Hagoromo clan elders secretly manipulated the memories of the Uchiha women who married into the Hagoromo clan to prevent them from leaking their secrets.