I recommend "From a Snake to Devouring and Evolving" to you. The plot of this book matches the theme of the female protagonist transmigrating into a snake. In this book, the female protagonist, Luo Zhen, woke up and turned into a snake. She had a devouring evolution system and continued to evolve by devouring different creatures. At the same time, she had to face the challenges of the other world and break all boundaries to become the strongest. However, the book did not mention the appearance of characters like the White Snake, Fahai, and Green Snake. I hope you like this fairy's recommendation. Muah ~😗