Hagoromo..

[XxxBeastxxX]

According to the manga Hagoromo Otsuki(so6p) created the stone monument in the uchiha meeting place to warn Uchiha clan members of what would happen if they mixed Ashura's blood with Indra's.

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But it also states some other stuff like Madara said in last weeks chapter...

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My question is, why in the hell would old man sage even put some shit like that on the stone monument?! i mean like come on man your were just asking for the end of the world...

 

[esenn1]

We must wait and see =D​

 

[The Amazing Spider Man]

He put it there to warn others but never thought someone would be insane enough to actually do it lol

 

[Rohan]

The Rikudou represents the Darkness according to Sir Derp Obito's theory, so the above might have been done by the Rikudou on purpose.

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Or, we can assume that there is another villain behind Madara manipulating all the information on the tablet and by extension, Madara.