A sizzling sound was heard as the corrosion on the wall spread out for a few centimeters before stopping. Lin Mu heard the sound and felt shocked at this. He didn't know what had just happened and felt confused at that.
He stood up and walked closer to inspect the wall and saw that a depression about half a centimeter was formed and it was about two inches in diameter. The gas that had touched the wall had dissipated and no traces of it could be seen.
The only thing Lin Mu could sense on the wall was the shallow depression and nothing else.
"What was that Senior Xukong?" Lin Mu questioned.
"…"
"Umm, Senior?" Lin Mu reiterated.
"Hmm, I do not know exactly. It seems to be the impurities being expelled from your body, but they shouldn't be this corrosive." Xukong answered.
"What's wrong here?" Lin Mu asked, feeling more confused.
