The winged skeleton could not care less about the mechanical soul's fear. He would not allow himself to become someone else's slave. He finally understood the Three Kings' fear of losing their freedom forever!
The symbol was a type of rule in the first place. If the winged skeleton was controlled by it, Saleen would be implicated. Saleen's soul bond would be forcefully restrained by that type of rule. Saleen could not leave this dimension ever again, or else he would immediately turn into the symbol's slave.
The winged skeleton did not possess Nailisi's god-gifted talent to cleanse the symbol. He was envious of Nailisi's ability to devour everything, it was the ultimate rule of Luoluokaluo.
"Master, I am about to die." the winged skeleton's soul flame turned from silvery red to transparent. The power that he absorbed from Judikaka allowed him to break through the limits of a grade-8 spirit and the restrictions of the bond with Saleen.