The Poison of Destruction art. When one reached the fourth level, it allowed them to store poison within the body and use it when needed. The internal energy helped control the poison that was within the body, but if the energy was shattered, the poison spread out uncontrolled.
Chun Yeowun was shocked when Chun Jongsum's face turned purple and his mouth was full of bubbles. He wasn't going to kill him because of the academy rule, but it looked like Jongsum was dying.
"God his internal energy is gone," Baek Jongmeng gasped. He realized why Jongsum had been poisoned.
'I knew something was going to happen, but this'
He didn't think Yeowun would destroy Jongsum's energy. He was not a martial artist, but he knew how important internal energy was for a martial artist. Looking at all those bones that had been destroyed, it made him frown.
'You should've stopped after breaking his bones. Why did you go so far?'