Questioner
Who was the last person in sacred valley to reach gold before the events of the story?
Will Wight
That's a great question, but unfortunately I can't answer it accurately without getting into why the people in Sacred Valley aren't Gold anymore, which is a spoiler.I will say that one of the founders of the Heaven's Glory School was a sacred beast who achieved Gold; a golden-scaled dragon that breathed light and heat. Legend says he's still sealed beneath Mount Samara, ready to defend the School in its hour of need.