Konnaha_yellow_flash

What tobi spoke of is how he knows to use it... but there are two different versions the manga has shown...

First... Izanagi, the uchiha's Kinjutsu... With only the power of the uchiha's YIN element... can make reality an illusion for the brifest of moments...
However, by adding senju hashirama's power... the time that reality can be an illusion is increased.... but is not required for the use of the uchiha's Izanagi though...
The jutsu Izanami was created to punish the users of this Izanagi because allows the user to cheat death and escape the consequences of ones actions......

Second.... the sage's Izanagi... the Original Izanagi which is the practical application of something called "creation of all things"... that by using the power of the Uchiha's Yin element... create shape and form with the imagination and spiritual energy... then use the senju's YANG element to add physical and life energy to bring the form and shape of the imagination to life...

A jutsu that just like the the thing it came from, can create anything...

The power to bring Imagination to life, making it real... that is the sage's Izanagi...

The difference between the two is that the uchiha's Izanagi only requires the YIN element of the SG and turns reality into an illusion, even for just a moment...
WHile the sage's Izanagi requires Uchiha's YIN element SG and the senju's YANG element powerful body to use... It brings Imagination to life... making anything one imagines real...

Big difference between the uchiha's and the sage's Izanagi's...

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People live relying on they're Knowledge and Perception, and thus are bound to them.....
Those Boundaries are what they tend to accept as "Reality".....
However..... Knowledge and Perception are both ambiguous....
so "Reality" could be nothing more....
then an illusion....

ITACHI UCHIHA