C170 Corpulent Flesh with Skin

"The reason why the silver needles turned black is because they encountered sulfur. They formed black silver sulphide. It has nothing to do with whether the poison is poisonous or not." Li Xin casually explained, "There happens to be a lot of sulfur in the egg yolk, so when the silver needle enters the yolk, it immediately turns black."

With that, he sternly warned, "Moreover