Unbelievable! The Spirit Mediums Are All Fighting Over Me

I was born with a pure yin constitution, a rare vessel for immortals. After visiting the Shrine of Ten Thousand Immortals, I caught the eye of gods from all sides, each wanting to take me as a disciple. My constitution is unusual: I can burn without dying and hibernate in ice. But having too many masters kept making my body suffer backlash. Ming Xiao made the Banner of Ten Thousand Immortals to help me, and I thought he was some kind of immortal too... Then he suddenly told me that my body could house many immortals, but this flesh belonged to him alone. I asked him who he was. He replied: The King of the Underworld!