I Went Down to Earth to Survive a Tribulation, How Come I Am Invincible?

[Single female protagonist, invincible, cultivating immortality, not a holy mother] Lu Lingling was bullied in Wanjian Sect because she could not practice. Even the younger disciples treated her coldly. Only the head brother would occasionally care about her. Finally, after being bullied once, a mysterious old Taoist helped her break the seal, and her cultivation has been advancing rapidly ever since. At this time, she discovered that the only senior brother who was kind to her turned out to be...