C400 Volcanic

While Niu led a group of people to search for the Frost Stone in the natural saltpeter pigsty, stables, toilets, and other corners, Chu Dong asked another question.

"Stone Master, do you know sulphur? It has a light yellow appearance, a very brittle crystal, and can very easily be crushed into powder. There is also a type of rotten egg, which is the special stench of rotten eggs