What's so Difficult About Cultivating Immortality?

After an unexpected time travel, Xu Yi appeared in the world of cultivating immortals. A [Book of Destiny Against Fate], divided into ten chapters, each of which has its own miraculous effect, one of which can be used to trace back life. However, there is a limit to the number of times, and it will dissipate when used up. Xu Yi was invited to the palace and fell into a whirlpool. In the end, his life stayed here and he used his first look back. After many hardships, he escaped from the palace and fled back to the village, but was regarded as a traitor by the villagers. When Xu Yi was still thinking about whether to wait until the second time to look back, he was suddenly shocked. In this world, there are many dangers. Only by becoming an immortal can one live forever. So with the help of the power of the [Fate-Resisting Book], I want to reach the path of immortality and walk in song! In this way, the page of [Book of Fate-Resisting] turns over until it enters a new chapter... The sea has dried up and the rocks have rotted away. After a thousand years, we will look back again. A monk in the immortal world has a long journey to immortality in front of him and numerous bones behind him. And Xu Yi has already ascended the throne of Immortal Emperor. In one thought, all the great avenues were extinguished. All living beings in heaven and earth, including the supreme immortal king, all bow their heads. At that time, I can finally say the following sentence lightly: "What's so difficult about cultivating immortality?"