Gelel Stone.
It was a special power possessed by the overseas Knight Civilization mentioned several times before.
It appeared in the anime Naruto the Movie: Great Clash! The Phantom Ruins in the Depths of the Earth.
No one knew how the Gelel Stone had come into existence.
They only knew that an incredible ore vein had been discovered back then.
The ancestors of the Knight Civilization refined these stones.
Then they crystallized them to unleash their full power.
This mineral... was named "Gelel."
In ancient times.
With the Gelel Ore Vein as its foundation.
A vast overseas civilized empire was established.
They created wells that never ran dry, livestock that grew to maturity overnight, and crops that bore fruit continuously...
They even conducted research into preventing biological aging.
But later, the immense power that had brought happiness became a disaster.
Humanity began fighting and hating one another over the power of the Gelel Stone.
Finally, they used the stone's power to start a war.
The earth-shaking war ultimately brought about the empire's complete destruction.
Only a small number of young people survived.
The ancestors of the Knight Civilization sealed the Gelel Stone's ore vein deep underground and swore never to awaken the stone again.
And only members of the royal family could destroy the stone.
The surviving descendants of the Knight Civilization, having lost their royal bloodline, began a life of wandering.
The southern waters of the Land of Wind.
The desert here gradually disappeared, replaced by mountains and vegetation.
This was where Pakura, betrayed by Sunagakure back then, had set sail.
She had traveled all the way to Kirigakure to deliver the alliance treaty.
At this moment.
A large number of metallic wreckages were scattered along the coast.
These wreckages displayed steel technology unlike that of the Five