Bab 134: Chapter 33: The Beginning of the Storm_5

"Although the blood has been drawn from these four White-haired Flying Zombies, I still need their corpses to refine them into Demon Skin Skeletons. In the future, when you establish an army, these will be of great use."

"Four Wind Demon Blades! You can't use them now, but they will be useful when you're building your own forces and rewarding others. You should know, these blades are coveted weapons in the mortal world, and even Outer Sect Disciples can use them. Unfortunately, these four blades are not spirit tools. They can further transform into Sound Killing Magic Knives, which are spirit tool level existences. The speed of these knives is like sound, breaking the void and killing with speed. In the past, they struck fear into the hearts of those on the Immortal Path."