He was fully aware that though Xuan Guang Practitioners and Hua Dan Cultivators differ by just one realm, the disparity between them is astronomical. Yet, he hadn't expected such overwhelming prowess, especially since Ning Chongxuan didn't even appear to be exerting his full strength.
He thought to himself, "I wonder if Brother Ning has cultivated the sect's Divine Skills?"
Upon reaching the Hua Dan Realm, it is said that one's Qi and Essence fuse into unity, and vast mana surges throughout the body. Only then can one begin to master the sect's Divine Skills.
Divine Skills differ from ordinary Daoist Techniques; when practiced to perfection, their power can be utterly unimaginable.
Take Zhuang Bufan's "Great Luo Heavenly Sleeve," for instance—when unleashed, even if an opponent possesses superior mana, without a Dharma Treasure for protection or the correct counter-technique, nine times out of ten they'd be drawn in, left completely at his mercy.