"This is..."
Casio's eyes became very serious.
He could feel a vague force controlled by him spreading, like a liquid trying to envelop his entire arm. But that wasn't a good thing.
As the cold power spread, Casio's control over it weakened, and it might risk getting out of control if unleashed again.
He released his right hand, and the blackness returned.
Transformed into a gently pulsating vein.
"A very strange thing... It carries a very dangerous aura hidden deep within." Casio lowered his head: "But why does the Secret Martial Art's perception of my body control suggests that it is a part of my body, no different from other parts. This black vein doesn't seem to harm me?"
He pondered for a while, then finally shook his head.
Casio gradually shifted his attention to cultivation.
The effect was terrible, not just a little terrible.
The reasons were essentially the same.
