Yes, that's it, so weak.
Xue Lingxue is herself the embodiment of both a musical and cultivation genius. The 'Surging Wave Assistance Song' is her masterpiece. Its power when unleashed is astonishing, and she originally intended to use it to test Chu Liang's true level of cultivation.
Because while essence can be concealed, the phenomena generated during the Zhou Tian cycle cannot be suppressed and can instantly reveal one's true level of cultivation.
Although she had never applied the 'Assistance Song' to Shu Mountain's disciples, she also knew what phenomena should occur when they used the 'Nine Heavens Mysterious Heart Technique'.
Qi Sea Xuan Core... Five Qi Initiation... Mysterious Woman's Celestial Heart... These are the phenomena respectively appear in the Fourth Realm, Fifth Realm, and Sixth Realm.
