I Became a Guardian Spirit

When he woke up, Li Xi found that not only had he traveled through a different world, but he had also become the guardian spirit of Jiang Yuanhao, the tail end of the ten thousand year crane. In this world, the strength of the guardian spirit depends on the quality of the guardian spirit. There is no doubt that Lin Bei, as an ordinary person, is naturally an ordinary low-grade and the most rubbish guardian spirit. However, Lin Bei discovered that he could actually return to his original world, and he could also practice through the so-called "Secrets of Martial Arts" and "Secrets of Cultivation to Immortality". Although the main world has no aura, it doesn't matter. As the other world becomes stronger, Li Xi's main body will also become stronger. The Eighteen Dragon-Subduing Palms are invincible. Marrow Cleansing Sutra, change your own talents, don't practice too fast. I'm Li Xi, would you like some exercises? The kind that costs no money! Etc! Jiang Yuanhao, where did my yin and yang reversal method go? !