As the final trace of the invisible killing intent turned into a rune and disappeared into the White Dog's body, the faint golden Killing Arrow at the center of her forehead had completely vanished, leaving only a chain that pierced through her forehead, eventually solidifying into a delicate and intricate imprint.
This was the Secret Technique Lu Chengfeng obtained from the gifts of Hou Yi, essentially an application of one's own Spirit Form, not a difficult secret technique or Divine Technique to cultivate.
If this White Dog dared to harbor ill intentions, with a mere thought, the imprint on its forehead would transform into an invisible Killing Arrow, instantly tearing through its skull, causing it to die on the spot.
Even if a trace of its True Spirit was hidden within the Ancient Lamp, now that this lamp had been initially refined by Lu Chengfeng, the life of this Demon Saint was thoroughly under his control.
