Snake Ancestor is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

An old snake in the village accidentally consumed a human pill, awakening its spiritual intelligence. From that moment, it embarked on the path of cultivation. In the brief span of a decade, the snake, undaunted by the passage of time, seized every moment. This is the story of an old snake becoming an immortal.