Stone Tablet

The stone tablet is a monument which was created by Hagoromo Ōtsutsuki in order to discourage his sons descendants from attempting to recreate the Rinnegan. The tablet can only be deciphered fully by the Rinnegan, while the Sharingan and Mangekyō Sharingan are only able to partially decipher it.

Sometime after Hagoromo's death, certain facts and details on the tablet were forged by Kaguya Ōtsutsuki's will, Black Zetsu]. The tablet eventually fell into the possession of the [[Uchiha Clan, where is was secretly keep'd in the Naka Shrine in Konohagakure.

Contents

 * The secrets of the Mangekyō Sharingan, such as instructions on how to obtain it, and its ability to control the tailed beasts.
 * Kaguya and the Shinju.
 * The secrets of Madara Uchiha's body.
 * Warnings regarding Kaguya's Infinite Tsukuyomi.
 * The Infinite Tsukuyomi is what would save the Uchiha written by Black Zetsu.
 * Secrets of the Uchiha Clan

Trivia

 * Kabuto Yakushi and Orochimaru, while unable to read the tablet, managed to come up with a hypothesis of the secrets based on many years of research.
 * Despite having neither the Rinnegan, nor the Sharingan, Black Zetsu was able to read and rewrite the text on the stone tablet.