If it were an ordinary disciple of the White Cloud Temple, they might not be able to defeat this Mountain Demon, after all, this Mountain Demon's body is indeed incredibly strong, full of Blood Qi, and as hard as iron.
But Lu Zheng is different; his greatest feature is his diverse array of methods.
When he discovered that even the Body-Freezing Curse was ineffective against the Mountain Demon, he recalled how the demon avoided Hu Cai Niang's gaze.
Could it be that its True Spirit is not strong enough?
As soon as he thought of it, he tried. Lu Zheng immediately slashed with a stroke of the Golden Palace Heart Sword.
No harm in trying first with a slash; if it's effective, great, if not, he'll consider other methods.
The Golden Palace Heart Sword directly cleaves at the True Spirit, and the Mountain Demon only feels a dazzling Divine Sword appearing in its mind, cutting toward its Divine Soul.
"Squeak squeak!"