After Returning from Seizing the Body, He Unexpectedly Found That He Had Become the Martial Ancestor.

I have one sword that can save the world, and one sword that can destroy the world. In the past, the Martial Ancestor Zhang Jiu overcame the catastrophe outside the world, smashed all the powerful enemies outside the territory with one sword, burned his own body, and died. In gratitude for his kindness, the world built a temple to worship him and respected him as the eternal martial ancestor. No one knows that the remnant soul of Martial Ancestor has not completely dissipated. Many years later, in Wuze City, Zhang Jiu, a young man with a broken family and no other options, offered his own life as a sacrifice to ask Wu Zu to take revenge in this world. "I will settle all the grudges for you, at the cost of ending your life." The young man readily agreed. When the Eternal Martial Ancestor takes charge of this frail mortal body, there will no longer be a destitute young man in the world. Only the Martial Ancestor who once dominated the heavens returns to the human world. Monsters are running rampant, aristocratic families are harboring evil, and shadows from outside the past are ready to move... In this life, the swords of the sun and moon come again, and all enemies can be killed with one sword.