Legend of the Phantom World

In the world of phantoms, reincarnation floats to the sky above Tianmu Mountain once every nineteen years. Zihuamen spent three generations of effort to create two peerless weapons, just to open the passage to the phantom world, but it led to a great war. Dugu Sword Immortal, what kind of legend is that, but why did he die with regrets? The young man has to go back nineteen years to find his father's regrets...