Eternal Cultivation: Starting with Three Generations Living Together

Xue Li traveled through time and became a farmer. He thought it was an ancient feudal society, but he found that something was wrong with this world:
There are warriors flying over eaves and walls, smashing monuments with one punch.
There are strange beasts the size of a small hill, which devour beasts and eat people.
There is also a legend that the immortal wields a sword and travels in Taixu.
Xue Li, who is already in his forties and fifties and over half a century old, thought he had no hope in this life. Fortunately, his life should not be cut off:
【Three generations】
【I am me, the father is me, the son is me. As long as the offspring continues, one can live forever. 】
If your qualifications are not good or if you make mistakes in martial arts, it doesn’t matter, I have descendants.
The path to immortality is too far and my spiritual roots are low. It doesn’t matter, I have descendants.
…
Many years later, the three Xue:
One person, the evil spirit is raging, swallowing up the sky and the earth!
One person, with a majestic treasure and appearance, is the only one in the world!
One man, wearing a white robe and wielding a sword, splits the sky with one sword!