"I see." Lin Tianlong looked at Elder Xu and asked, "However, if you cooperate with someone, then the person who cooperates with you must also know the method of arranging the formation of this guardian core, right?"

"Hmm. Xu Lao nodded and said: "Then it also depends on whether you choose that person to be trustworthy or not, if it is a credible person, even if you give him this method." ”

"Then teach me quickly. Lin Tianlong said suddenly.

"What?" Xu Lao confirmed again as if he had hallucinated: "Tianlong, are you preaching to you? But do you have a heaven-level divine thought?"

"Yes. Lin Tianlong locked his divine thoughts on Xu Lao, and after a moment, he retracted it, and then looked at him with a smile.

"Really...... There really is!" "Old Xu was frightened, not to mention that he hadn't even reached the heavenly level, even if it was the ground level, there weren't necessarily many, and they were basically emperor-level cultivators.

And now, a heaven-level divine person is standing in front of him alive, and this person still knows him. Isn't this a pitfall?

......

Next, Xu Lao taught Lin Tianlong the method of arranging the Guardian Core and the materials needed, and Lin Tianlong spent an hour digesting these, because there were too many materials to use to arrange the Guardian Core, but fortunately, Xu Lao had ready-made materials.

But after Lin Tianlong read it, he was still a little relieved in his heart, because most of the materials on it were in his Linglong ring, but the most important material was not, the heart of the sycamore.

Legend has it that the phoenix likes to inhabit the sycamore tree, and the sycamore tree must have several conditions if it wants to have the heart of the sycamore, first, the age of the tree must be more than 100,000 years, and second, it must be a refined sycamore tree to transform the heart of the sycamore.

And Xu Lao also didn't have the heart of the sycamore, he used a material that was slightly inferior to the heart of the sycamore, so the power that this formation was supposed to emit was now unable to be exerted.

After Lin Tianlong finished digesting it, Xu Lao said, "Tianlong, let me ask you, what is guarding?"

"Guard?" Suddenly, Lin Tianlong's first thought was of his father, Xin'er, Zhizin, Ling'er, and rats, Fan Lao, Tianxuanzi and other people who were good to him.

So he replied, "To protect is to do your best to protect your important things." ”

"Sort of. Xu Lao nodded, and said, "Then do you know that there are other ways to guard?"

"Other ways?" Lin Tianlong wondered.

"Yes, for example, let's take the Phantom City where we are now, if the enemy comes to attack us, and we are not capable of the enemy, then we can only activate this guardian core, but it can only be a passive defense, if the enemy bombards for a long time, then the protective shield of the guardian core will be blasted sooner or later, not to mention being blasted, as long as there is no strong person above the peak of the saint level in the southern region, with the current defensive power of the guardian core, it will not be destroyed, unless it is bombarded for a long time. Speaking of this, Xu Lao paused.

Then he added, "But what if the Core of Guardian has the ability to attack?"

"What do you mean?" asked Lin Tianlong.

"I mean, guarding, in fact, sometimes you can do it by attacking. Xu Lao said: "If you have the heart of Wutong, then, the defense of this formation will be doubled, and it will also have the ability to attack, as long as it is within a certain range, it can attack as you like, and the strength of this attack is ......."

Elder Xu smacked his lips and said, "At the very least, it will have the power of a beginner-level emperor-level powerhouse." ”

"So strong?" Lin Tianlong took a deep breath, it seems that he will have to pay more attention to this Sycamore Heart in the future, if the Sycamore Heart is fused in, then important people can stay inside, and there is no need to worry about being threatened by others.

"Although we don't have the Heart of the Sycamore, and the Core of Guardian can only defend, we can take other routes. Xu Lao smiled and said, "We can arrange more killing arrays around the city wall, or we can arrange phantom arrays." ”

"Wonderful!" Lin Tianlong suddenly thought of something, and said, "Wouldn't it be better if we dig some traps or something like that outside?"

"Well, that's a good idea. Xu Lao appreciated.

Speaking of doing it, after a while, there were many wolf tooth group members digging traps around the city wall, and Xu Lao and Lin Tianlong were also busy, because they had to arrange some formations on top of the traps, although these formations would not play a role in those with high cultivation, but their main purpose was to stop people with medium cultivation, because if they wanted to capture a city, unless they had peerless cultivation, they would only have to use people to pile up.

After half an afternoon of busyness, I finally finished this qiē, and the rest was to improve the core of protection.

In the evening, several people gathered at the dinner table, Du Qinghua and Black Panther were fighting for the amount of wine, and neither of them used cultivation to force the wine, but even so, the amount of alcohol between the two was very good.

There were more than a dozen empty wine jars around each of them at this time, which was enough to show that their alcohol consumption was good.

Everyone else was the same, they didn't use cultivation, and they drank very happily.

"Come, Lin Feng, I respect you. The black panther picked up a jar of wine and said to Lin Feng: "You are the first brother of my black panther in his life, I respect you." ”

After speaking, he drank all the jar of wine with a grunt, and then he lay directly on the table, and at the same time, Du Qinghua also fell down with him.

"It seems that the two of them can only wait for next time if they want to fight together, hehe. After drinking a jar of wine, Lin Feng looked at the two people lying on the table and smiled.

"He said you were his first brother. Xu Lao said with some embarrassment: "I can't think of what kind of life he lived before, so he guarded against everyone, and there was no real brother." ”

"It's nice to have brothers. Xu Zihao looked at Lin Tianlong and said. He also learned the news of Lin Tianlong's gift of vitality grass from Xu Lao, and he didn't feel strange about this, can my brother not accept it? If he doesn't send it, it will be strange!

"Good brother, for life. Lin Tianlong raised his glass and said.

......

The next day, Lin Tianlong and Xu Lao stood in front of the core formation of the Guardian Core, while the others watched not far away.

"Let's get started, Elder Xu. Lin Tianlong said.

"Hmm. Elder Xu instructed: "Tianlong, remember what I told you, you only need to concentrate your divine thoughts on the core formation, and imagine that it is small." ”

After speaking, Xu Lao's hand changed for a while, and then a wave of fluctuation shot into the core formation with bursts of colored light.

Xu Zihao and the others on the side only saw that the core formation was getting smaller little by little, and it lasted for more than half an hour before it stopped shrinking.

Now, Lin Tianlong and Xu Lao were also weakly retracting their divine thoughts and cultivation, and looked at the core formation in front of them with a shocked expression.

Now the core formation has become only the size of a dining table, even if it is placed in the room.