After he read this Yin Yang Devil Art, Yang Song understood why Xuan Kong was so evil, had a dual personality, and was so bad in Dharma.

After practicing the Yin Yang Devil Art, the practitioner would undergo a great change. He would be forced to commit ruthless and inhuman acts such as killing and torturing. However, the reason why the practitioner was forced to kill was not actually a groundless principle and pure insane act.

The main reason why the victims had to be martial artists was that the Yin Yang Devil Art practitioner had to suck energy from those martial artists in order to upgrade their own martial art realm.

This kind of thing was a taboo in the martial art society and it was labeled as an evil act. Similar things could actually be found among the abyssal beasts, such as eating their own kind in order to promote their own strength.

As for those baby corpses, they also had their energy absorbed clean. To some extent, a new-born baby had even purer energy than ordinary martial artists, because in their fetus state, the baby was fed with pure essence which was converted from the food that their mother consumed.

But from what Yang Song had inspected earlier, there were only a few baby corpses as the energy in the babies was too pitiful, hence, Yin Yang Devil Art practitioners wouldn't target babies unless they were in a desperate situation.

The dual personality of Xuan Kong also stemmed from a specific reason. Every Yin Yang Devil Art practitioner would involuntarily develop a second personality in order to blend themselves with society.

Since this devil art was created based on a dharma sutra, it worked best on monks because the kinder a person was, the more evil he would become when practicing this technique. This was why Xuan Kong was so proficient in controlling his two personalities.

But at the end of the day, this kind of devil technique that could help a person to promote his martial art realm fast unavoidably had backlash and side effects.

Because Xuan Kong's martial art realm advanced too fast, it led to an unstable foundation and this was the reason why Xuan Kong's martial art realm regressed. But it was mentioning that it was only one of the two reasons.

The other reason why his martial art realm regressed so badly was that he was injured internally.

The Yin Yang Devil Art practitioner must have a firm heart, however, the taste of power was too hard to reject, hence making most of them unable to make further progress. Like Xuan Kong, he was stuck at the 9th Tier Master realm, unable to break through to the Grandmaster realm and his realm even fell down.

This Yin Yang Devil Art indeed had a characteristic of an evil art, but in this world, there was no evil art, only fragile heart and evil practitioner. Therefore, Yang Song decided to keep this technique in his collection.

There was another thing that was still puzzling Yang Song greatly. The Yin Yang Devil Art was created based on the Dharma of Yin and Yang Sutra and the Yin Yang Martial Art, and the Yin Yang Martial Art's owner spread a part of his technique, but based on Yang Song's experience, how could it be possible to create a new technique with only a part of another technique?

Therefore, Yang Song was wondering if the creator of the Yin Yang Devil Art had a relationship with the owner of the Yin Yang Martial Art. Or could they be the same person?

It was a pity that in the introduction page of the Yin Yang Devil Art, the creator did not specify the creation date, and he also did not know when the Yin Yang Martial Art was written. Otherwise, Yang Song would be able to connect some useful clues.

After keeping the Yin Yang Devil Art in his storage space, Yang Song continued to look around the secret underground room to see if there were other things that could catch his interest.

But to his disappointment, Yang Song did not find anything other than some pieces of jewelry and money, which should have originally belonged to those dead martial artists.

Although this underground secret room was not suitable for cultivation, Yang Song felt that it was a good secret base otherwise.

Yang Song had a plan that if his family could become powerful in the future, he would ask the country to see if he could buy this White Dragon Mountain from them.

"Well, the gain today is not that bad. At least I got an interesting technique."

…

Yang Song had already left the vicinity of the White Dragon Temple and was currently on his way back to the White Dragon Abode.

Not long after, Yang Song came to the White Dragon Abode and took out the Yellow Spring Shell Bead and cultivated.

As soon as he started absorbing Spiritual Energy, Yang Song felt that he should be able to make a breakthrough by tonight.

With no one disturbing, Yang Song continued to cultivate silently.

…

Black Gang Paradise District, Black Wolf Club.

Inside an underground room exclusive to the main members of the Black Wolf Gang.

Several looking people were sitting around a square marble table. Lang Ping, in a black suit, was sitting in the main seat.

At this moment, a muscular man with a shiny bald head opened his mouth, "I did not expect that with so many Masters, Wu Dahai still perished. It seems like this Yang Family is not as simple as it seems on the surface."

Lang Ping's face was not so good, he seemed to be quite angry, "That's not the main point, the most hateful thing is that our two 'puppets' rented by Wu Dahai died in the Yang Family, which wasted our resources greatly!"

A woman with a long tobacco pipe suddenly said, "What can we do about this? What we rented to him are not vehicles but humans, though they lost the ability to think. What's more, Wu Dahai used them to fight not to ride, so it's inevitable that they died."

The woman then sucked the pipe with her sexy lips and puffed out smoke slowly.

Lang Ping took a deep breath and said, "This new business is not bad, but it's a pity our 'products' have to face great danger of extermination…"

"I know your thoughts. You want to treat the puppets as milk cows, squeezing milk out of them until they're squeezed dry, however, it's obviously impossible. So you can just rest your mind," the woman interjected.

The bald man leaned back slightly and suddenly said, "I think we have to find more customers as soon as possible so that we can get more money to exchange for those 'Puppet Makers' and Final Boosters. Don't forget that we are not the only group of people working under that place. If we let the opportunity to get more benefit slip by, then other groups will surely suppress us and we will face danger."

Everyone of course understood this as well, but what could they do? Finding customers was easy, but persuading them to rent their puppets was not easy at all. And this had to blame on the price of the puppets.

"If we lower the price…" The bald man slowly said.

But before he could finish it, the sexy woman interrupted him, "That is not possible. The other group set the price the same as ours. If we dare to lower the price, they will join forces to attack us. Because the current price is already the lowest we can set. Think about it, one Puppet Maker costs as high as 60 million C dollars, and one Final Booster is 70 million C dollars. The price of the puppet is only 150 million each. Do you think lowering the price will be good for us?"

Everyone fell into silence and their hearts heavy. Just as they were thinking of the plans, Lang Ping's phone suddenly rang.

"What is it?"

"Boss, you have a customer. He seems to want to talk to you about the new product."

"Oh, tell me about it."

"He's from the Li Family."

"Is he Li Wanjing of the Li Family?"

"No, it's Li Wanjing's worker."

"I see, lead him to the special room."

After hanging up the phone, the bald man and the sexy woman looked at Lang Ping.

Seeing their gazes, Lang Ping answered naturally, "It seems like the Li Family wants to do something."

"That's unexpected. What does the 'righteous' Li Family plan to use the puppets for?"

"Do they want to research the puppet 'makers'?"

"Impossible, that's the product from 'that place'. The Li Family wouldn't be so stupid to offend that place."

"That's true too, it seems like the Li Family plans to eliminate some people."

"Is there any guess?"

"I don't know."

"Well, let's go to receive the guest from the Li Family."