Probably a plot hole since Jadeskin had a ton of property changes throughout the novel. Started something like an ice type then from a sensory type to a physical type then a weird sealing type then a physical type again then a moon type then it became a physical type again then a purity type.
i think that its blood legion leader. I tjink that theyre just implying its qin xiu so we wont think otherwise and so that there would be a plot twist to this revelation