How Can This Immortal Cultivate?

The world has undergone tremendous changes, and the aura is about to be completely cut off. Everyone in the world of immortality is in danger. In order to continue the inheritance, all major sects are looking for ways to escape. Tianyi Sect, the sect where the protagonist Lin Yu lives, chooses to seal the entire sect with a secret method, waiting for the aura to recover. When the catastrophe came, Lin Yu was used by the sect to use a secret method as the key to unlock the seal. When Lin Yu became an immortal, the sect would reappear! But he didn't expect that this world would already be out of his mind after he recovered.