A millennia ago the species roamed free, human, Trico, the many other inhabitants, they all coexisted in harmony, untouchable.
Nestled deeply in the heart of the strange world was a small sphere of glowing blue light, its existence unknown to all until one man stumbled upon it.
He was the first to touch it, and the darkness of his heart shaped the sphere around him from the stone rose seven humanoid suits of armour, their eyes a dull glowing blue, spears wielded in their gloved hands.
The man watched as the land spiked suddenly around him, rising impossibly high, the sphere the centre to it.
Then the sphere lashed out, killing the man, dappling his skin in strange grey tattoos.
So the valley was born.
So the Trico were possessed.
So the darkness was welcomed.
Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.
[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]