Lu Yuan's qi and blood roared within him, and his inner force surged like a great river.
Over and over, it scoured and tempered his skin.
At last, his skin began to redden.
It wasn't the flushed red of blood rushing to the surface, but the color of copper heated until it glowed.
A violent pain kept striking him, as if someone were scraping him inch by inch with a sharp knife.
It was also as if countless ants were gnawing at his skin.
Lu Yuan's expression didn't change. He didn't even groan.
As long as he could grow stronger, what was a little pain?
It was nothing but a bit of wind and frost!
"Bronze Skin, achieved!"
At last, Lu Yuan slowly exhaled a mouthful of stale air.
He raised his hand, and a thread of inner force flowed through it. Faint, ancient-bronze patterns appeared on his skin.
Its sheen was subdued, yet it carried an indestructible quality.
"Clang!"
Lu Yuan grabbed a saber from the weapon rack and brought it down hard on his palm. A clear clash of metal rang out.
The sharp blade had several chips in it.
His palm, however, was completely unharmed—not even the faintest white mark showed.
This was Bronze Skin, tougher than Iron Skin, with defensive power at least two or three times greater.
At this point, he could probably stand still and let people hack at him as they pleased without suffering so much as a scratch.
But it still wasn't enough.
For true geniuses, Iron Skin was merely the entry level. Bronze Skin was what they truly sought.
But Lu Yuan was after the pinnacle of the Skin Refining Realm: Gold Skin.
[Five Elements Vajra Body, Skin Refining Chapter: Mastery (2333/150000)]
Although the proficiency cap had reached a