Uchiha Madara got a system of unknown origin in an accident. For him, accidents have become a common thing in life.
But this accident is obviously not so unpleasant.
From the system's words, he learned that the infinite Tsukuyomi he was about to execute was a deception.
If it were true, then he couldn't hang himself from a tree.
He didn't want to believe it, but he couldn't help but believe it. After all, he only had one life.
To this end, he embarked on the path of finding the truth and exploring reality.
On this long road of exploration, Uchiha Madara transformed into countless individuals, letting them become his own eyes, his own hands, his own brain...
Intention: No matter how you change, I will know your soul.