He really couldn't understand why Mo Wuji knew about Darkwood as well. When he heard that Mo Wuji didn't need too much god crystals and only wanted half, he wanted to spit out a mouthful of blood too.
"How do you know of Darkwood?" Since he still needed Mo Wuji's assistance, Kun Yun suppressed the desire to cause trouble with Mo Wuji.
Mo Wuji chuckled, "So it's really Darkwood. I read about it in a damaged jade slip. I didn't expect it to really exist."
For the Darkwood, he actually saw it from the crystal ball of Ku Cai. It was a tree that had the Laws of Darkness within - essentially a priceless treasure. One could say that any cultivator that cultivated with Laws of Darkness would view Darkwood as their most precious item. But what lay before him wasn't Darkwood itself, but a piece of damaged Darkwood only.