“This is our ancestor of the Jiang family. The Jiang family is particularly skilled at raising Gu, and our ancestor was the best at it. For hundreds of years, no one has surpassed her—because she herself was a Gu.”

Lu Feiyan said that others raise Gu, plant Gu, and even step into the mortal world to compete for fame and fortune, while the ancestor secluded himself for ten years and cultivated himself into Gu.

When she emerged from seclusion, she was incomparably beautiful.

"She cultivated herself into a Gu poison, and became incomparably beautiful, but she developed a problem: every time the moon is full, she loses her mind..."

Her situation was exactly the same as Yin Jin'an's.

Upon hearing this, Jiutian frowned and asked, "So what happened to your ancestor afterward?"

Lu Feiyan rubbed the secret letter between her hands and said to Yin Jin'an, "On the night of the full moon, she lost her mind and the ancestor mistakenly killed many people. She was very remorseful and locked herself in a cave on the cliff behind the mountain to study the method of suppression. She then secluded herself for ten years and developed a way to break the spell."

There was indeed a way to maintain the fighting power of the human-gu and ensure that consciousness was controllable. For a time, the Queen's Empire was incredibly powerful.

Later, a clanswoman named Jiang Rushuang, who served the ancestor, possessed extraordinary talent in bloodline and Gu techniques. The ancestor also needed to pass on his knowledge, so he taught her the secret method of refining human Gu.

Jiang Rushuang also mastered the human Gu technique within a few years.

She thought she had become as invincible as her ancestor, so she wanted to kill her ancestor, seize power, and rule the world.

The ancestor was filled with regret, but also relieved that he hadn't taught her the secret method of maintaining sanity on the night of the full moon.

On the night of the full moon, he arranged to meet Jiang Rushuang in a secluded mountain. Taking advantage of Jiang Rushuang's loss of reason, he fought her all night and finally killed her.

From then on, the ancestor kept the secret methods of refining human-cursing gu and breaking human-cursing gu on the night of the full moon separately. Only the direct female emperors of each generation of the Jiang family would inherit the two complete sets of information.

Lu Feiyan said with a half-smile, "Emperor Aotian, if I am not mistaken, the so-called Spirit Clan to which your mother belongs is the traitor who escaped from Jiang Rushuang's group. They only know the secret method of refining human Gu, but do not know how to break the secret method of the full moon night."