As for the Desolate Heaven Tyrant Body Technique (fragment) and the Celestial Star Face-Changing Technique, those were both acquired from the Gu Ji Storage Bag.
This Desolate Heaven Tyrant Body Technique can temporarily boost one's cultivation, and if trained to perfection, it can be fused with the Celestial Ghost Devouring God Technique.
Maybe, after fusing them, the increase to cultivation will be even greater.
Lin Chang'sheng also planned to practice the Celestial Star Face-Changing Technique, so that later he could combine it with the Bone Transformation Technique and make disguising his appearance practically undetectable.
As for the remaining palm and fist techniques, Lin Chang'sheng felt they were his weak points; if he ever ran out of Spirit Treasures in a fight, then his hand-to-hand capability would definitely be his Achilles' heel. So he figured, why not train these two Immortal Techniques to perfection and then merge them with his existing palm and fist techniques?
