I Don't Even Know Aura, How Can I Become a Sword Fairy?

When he was seven years old, the village was burned down by three immortals in white clothes. My parents are dead. He has no spiritual roots, no master, only an iron sword worth thirty cents and an arm that wields the sword a hundred times a day for seven years. He was making a living at the bottom of the world of immortality, until a crazy old man said: "What you are practicing is not a sword, you are refining yourself into a sword." Later, Tiandao chose him - not because he was strong, but because he was contradictory enough. He doesn't want to save the world. But there are people in this world that he wants to see alive.