Questions About Becoming an Immortal Starting from Omniscience and Omnipotence

Lin Zhian woke up from a coma, only to find that there were many unknown memories in his mind: In the far north, under the glacier, there is actually a once glorious giant king's court buried. Tens of thousands of years ago, the extremely powerful Yu Dynasty was destroyed overnight because of a sword. In the endless sea, a giant sky-swallowing beast slept for a long time, just waiting for the return of its master. Ancient secrets, cultivation secrets, forbidden techniques... Alchemy and weapon refining formations, swordsmanship and physical training... I am the only one who is omniscient and omnipotent in cultivating immortals and hundreds of arts. But who can tell me why I was lying on the fairy's lap as soon as I woke up?