บท 757: Refine divine weapon!

The wind howled ear-piercingly, tearing the air inside the Bone Material room. It was like a sharp weapon was prickling people's eardrums, making the soul twinge as if it was pierced by a needle! 

The Bone Thorn wasn't visible in the Bone Material Room, but it was howling fiercely. Also, there was no strange energy surging. The wind howl seemed to hide in space slits, making it hard to detect.

Shi Yan squinted. His aura was cold, sharp, and wicked, just like a spear, giving people a weird feeling.

The Vermilion Bird True Flame got back to Shi Yan's soul altar. The ground in front of him was full of black and gray viscous substance, the contaminants extracted from the Bone Thorns.

The wind wailed unceasingly, crying in the Bone Material room. This eardrum-tearing sound discolored Zi Yao. Although she had urged her soul fluctuation as a Third Sky of King God Realm warrior rippling around the room, she couldn't find the Bone Thorns.