"Jiuyou has been ordered to lurk beside the Third Prince for a long time." Wu Nian said: "They thought they had monitored everything in the Demon Lord's City, but in fact, no one escaped the Demon Lord's eyes. Including the henchmen befriended by the princes, many of them were also arranged by the demon lord. ”

"That's fine." Qin Zong was taken aback, but after Wu Nian's explanation, Qin Zong could understand the reason why Shen Dingtian hadn't come forward from beginning to end. There are three sons under his own hands, two sons compete for the position, and one son is sandwiched in the middle to play haha, the feelings are all within his monitoring range, and it is even very likely that even the closest people around him are actually sent by God.

This feeling of being watched made Qin Zong feel a little desperate.

However, undercover has always been risky, and God Dingtian can send someone to intersperse under his son's hands, and can make these cunning living treasures not find out, it must have used some special means...... Qin Zong remembered that there was a magic weapon that could trigger the "keyword", which could be implanted with a secret order in his memory, and he would not think about what his task was at all in normal times, and only when the secret order was triggered, this memory would be activated.

And this kind of secret order is suitable for undercover agents.

"The Demon Lord is like a god, so you must know what we are here for?" Qin Zong smiled, he looked at Wu Nian's slender legs that seemed to be covered with a layer of black silk, and sighed in his heart at the power of genes...... In the case of half-siblings, Wu Nian and her brother Wu Xiang are too different, it is simply a combination of beauty and beast.

"Of course Lord Demon Lord knows that Mr. Qin is here for the Sub-Holy Spirit Stone. And my trip is precisely to explain this matter to Mr. Qin. Wu Nian sighed: "Frankly speaking, there is such a thing as a sub-holy spirit stone...... Not in the Demon Domain at all. This is just fake news released by the Demon Lord in order to promote the tourism of the Demon Domain. It's just that I didn't expect Mr. Qin to really believe it. ”

Qin Zong: "Is it not in the Demon Domain, or does it not exist at all." ”

Wu Nian: "The Sub-Holy Spirit Stone exists, but it is not in the Demon Domain. It is rumored that this is a heaven and earth spirit stone that combines high-density psionic molecules, and the spiritual power worn by a cultivator will achieve a large increase. If it can be ground into a medicinal powder and swallowed, it can even activate the cells of the whole body, so that the realm can advance by leaps and bounds in a very short period of time. Once upon a time, the Sub-Holy Spirit Stone was also used for post-war restoration. ”

"What do you mean by post-war repair?"

It means that the post-war repair between the mighty is to destroy the withering and tearing the space with their hands and moves, often causing all kinds of spatial rifts. And the sub-spirit stone is an important material used to repair the rift. If there are enough of them, they can actually be used to patch the loopholes of the Four Extremes Aura...... But unfortunately, as far as I know, the sub-spirit stone has been consumed a long time ago. ”

Wu Nian's words made Qin Zong fall silent.

Regarding how to repair the loopholes of the Four Extremes Spiritual Qi, Qin Zong had actually been consulting the information, and he pinned the hopes of the entire cultivation realm on his body...... But it's a pity that there was finally a new clue, and it was broken again.

"There is a long way to go to fill the loopholes of the Four Extremes Aura, of course it is not that easy, Mr. Qin does not have to mind. The sub-spirit stone is a natural product, just like the oil resources of human beings, it is non-renewable. Once consumed, it's gone forever. And it is not possible to produce it by any of the available means. ”

In this regard, Wu Nian also expressed deep regret: "When the old demon lord was in the past, he also bought a large number of sub-holy spirit stones, but it is said that they were used for healing. Back then, cultivators had wars with the Demon Domain several times, and our Demon Domain relied on the hoarded sub-holy spirit stones to fight repeatedly, and finally managed to keep this place. ”

"Not a single one?" Qin Zong asked.

"Not a single one." Wu Nian nodded: "Lord Demon Lord also wants to help Mr. Qin, but it's a pity that there is indeed no sub-holy spirit stone in the Demon Domain now." If it weren't for the cultivators who launched so many rounds of attacks on the Demon Domain back then, things wouldn't have developed to this point. ”

Speaking of this, there was a slight sadness in Wu Nian's eyes: "We demons are also victims, and no one wants to be contaminated by demon qi back then." The old demon lord finally found a way to control the demonic qi, so that these cultivators who were contaminated with demonic qi would not die and have their own consciousness. It's a pity that those cultivators who are high up in the world don't recognize or recognize our existence at all...... Waging wars has led to the destruction of human lives and the deterioration of the environment. In my opinion, the cause of the loopholes in the Four Extremes Spiritual Qi was caused by the war back then. ”

As he spoke, Wu Nian pointed to the huge tower outside the window, within sight of him in the distance: "See, Mr. Qin." ”

Qin Zong followed Wu Nian's finger and looked at it, in fact, he had observed it a long time ago.

This is the landmark building of the entire Demon Lord City, that is, the magic tower of the Demon Domain!

Against the backdrop of the night, the remnants of the Empire State Building's magic tower, which was as tall as the Empire State Building, were filled with a faint purple light, revealing the smell of danger.

"The evil spirit suppressed here is the old demon lord in the war. Because of the repeated use of sub-holy spirit stones to restore injuries, the demonic nature has been completely activated, and the method of using the old demon lord has been unable to stabilize the spirit. The old demon lord couldn't bear to kill them, so he could only suppress them and live in the magic tower. The spirits of these people are good and bad, and they are locked in the magic tower and do not see the light of day...... Some choose to commit suicide, while others die of old age in the magic tower. ”

"They are all people who have a sense of autonomy and can coexist peacefully with the cultivators. It's just that because the demonic qi is polluted, it has changed its appearance and become ugly, so it is not recognized by the cultivation world...... The prejudices of the human heart are a big mountain, and now these prejudices are locked in this eternal magic tower, with no sunlight or warmth. ”

"The Magic Tower, when was it built?" At this time, Qin Zong was silent for a long time before he asked.

"At the time of the Second Demon War." Wu Nian said.

"It's the period when the old demon lord used a lot of sub-holy spirit stones." After Qin Zong finished speaking, he saw that the expression on Wu Nian's face twitched significantly.

Although Wu Nian was no longer willing to admit it, Qin Zong still guessed a possibility......

Back then, the material used to build the Magic Tower was actually the pile of last sub-holy spirit stones that might be the only remaining in the cultivation realm!

Only the power of the Sub-Holy Spirit Stone can suppress so many uncontrolled demon spirits here.

If it is said that the cause of the current four-pole aura loophole is the Demon Domain War back then......

So the method used now to fill the Demon Domain War may be to sacrifice the entire Demon Tower and refine the Sub-Holy Spirit Stone to repair the loopholes.

This group of demons was originally all human, but they were accidentally contaminated by demonic qi and changed into another ugly appearance...... Just because of its ugliness, it was discriminated against by the cultivators, and the cultivators even did not hesitate to start a war for this, and now after this war, it is necessary to let this group of demons who were once despised by the cultivators sacrifice their own magic towers to save the entire cultivation world.

Is it really fair to do so?