Fairy Sister, Why Did Your Sword Come from the Future?

Li Sushang can borrow the sword of the Japanese Sword Immortal to kill all the current enemies and become almost invincible in the world. However, this kind of heaven-defying power is bound by strict cause and effect: She must cultivate to the corresponding realm within the set time limit and understand the designated sword techniques; if there is a slight mistake, it will disrupt the long sequence of time, cause the cause and effect to collapse, and ultimately end up with her soul and ashes wiped out. From then on, she had to work day and night to fight for opportunities and treasures, not daring to stop at every step, all in order to earn a chance of survival under the shackles of fate. And as her cultivation deepened and her path became farther and farther, she gradually came into contact with the shocking secret that her future self had deliberately hidden deep in the years.