Snake Coffin

On the day of my birth, when my family was moving the ancestral grave, my father killed a big snake in the coffin that was about to shed its skin and turn into a dragon. He was almost bitten to death by the snake. A rice woman in the village saved my father's life and left me a piece of snake-shaped black jade. She was also bitten to death by a snake. Just after my eighteenth birthday, the corpse of the dead snake actually appeared in the coffin of my ancestor... Only the black snake in the snake-shaped black jade tried its best to protect me, and at the same time told me the secret of the snake coffin.