Find eight stone tablets and activate them. The positions of the eight stone tablets in the Snow Mountain are: below the statue, near the Abedo camp, in the monster pile, in the ice, next to the water ice book, nearby, nearby, nearby.
After all the lights are lit, a mechanism will appear in the middle of the eight stone tablets, which can be opened after interaction. Then open it, and all the inscriptions will light up.
The above information is for reference only. It is recommended to consult the official customer service of the game to get the most accurate unlocking method.