Zhu Bufan didn't know, but Zhu Yuheng, a Tenth Rank peak master, obviously knew the origin of the Copper Blade, and cried out in surprise.
The speed at which the yellow halo spread was extraordinarily swift; even though Zhu Bufan was quick, how could he possibly keep up with the speed of light's propagation? In the blink of an eye, his body was covered by the yellow glow.
The moment Zhu Bufan's body came into contact with the yellow light, he felt as if a massive boulder was suddenly pressing down on him, his body felt more than ten times heavier, especially when moving, the strength required was at least ten times more than before.
What's more, this situation worsened as the concentration of yellow light increased. Eventually, it seemed not only the movements of his body faced tremendous resistance but even the Inner Qi within him became extremely sluggish, circulating very slowly.
