After sending Lu Zhenbang away, Chen Hao felt that it was time to go and see Xiao Yi.

The abandoned mine in the northern suburbs where Xiao Yi is located is not too far from the mouth of the Watchman Valley Gorge. In less than a quarter of an hour, Chen Hao rushed to Beiying with the "Imperial Qi Wind Technique".

From a distance, he saw thousands of people practicing the art of arranging stone wall tiles on the sloping school yard on the side of the mine.

"A long snake formation!"

With the commander's order, 1,300 stone wall bricks flew up in unison, quickly growing larger in the air, and then seemed to be flying chaotically, but in the blink of an eye, a neat high wall hundreds of zhang long was built on the battlefield!

"Iron Bucket Array!"

The stone bricks flew back one after another, and they flew up and grew larger again, and in less than ten breaths, a circle of heavy brick walls that followed each other formed a small fortress.

Although the texture of the stone wall bricks is not as good as the iron wall bricks, if it is in the impact of the demon beast, it will undoubtedly have a greater advantage if such a fortress can be erected at any time!

And Chen Hao has not given up the action of collecting iron wall bricks.

Over the past year or so, he has successively obtained more than 300 iron bricks through Wan Yihou's smuggling.

Although the iron-walled bricks are in Baiju Cave, it is considered to be the most advanced magic weapon, but under the lust for profit, there will always be people who take risks and get them from various channels to sell salt.

At the beginning, the Heavenly Dao Alliance sent 20,000 monks armed with iron-walled bricks to come in, and Chen Hao didn't know how many had escaped. But the intact iron-walled bricks left in the White Horse Cave must have thousands of pieces.

These iron-walled bricks are in the hands of the Cao family, but they are not very suitable for collective use to cooperate with demon beasts in battle.

Because the demon beasts in the White Horse Cave are only of the first order, their intelligence cannot be comparable to that of human monks. Besides, they were able to gain an advantage in the battle against the Heavenly Dao Alliance by relying entirely on their overwhelming numbers.

If you use iron bricks to build a city wall and divide the demon beasts, you will lose their own strengths.

So on the side of Plains City, they still haven't given up their strengths in taming beasts. Most of the iron wall bricks obtained were sealed, and some of them fell into the hands of some of the upper echelons as high-level magic weapons.

Chen Hao went to the Beiying campus first, and was about to find someone to inform Wang Qinian, who was in charge of the mine, but found that he happened to be in charge of the command on the school field.

"Hello City Lord!" Wang Qinian saw Chen Hao and stepped forward to say hello.

"Good job!" Chen Hao praised.

Wang Qinian smiled honestly and said, "This is all done according to your wishes, Lord of the City." ”

"Easier said than done. I said what I asked, and you can do it, and that's great. Chen Hao was not stingy with his praise at all.

"Thank you for your praise. City Lord, have you made a special trip to inspect our training?" Wang Qinian said.

"I'm going to go into the mine to have a look, you go and say hello to the warrior in charge of guarding the mine. ”

Wang Qinian nodded, called a colleague, briefly explained a few words, and came to the outside of the mine with Chen Hao.

"Go get a shovel. Wang Qinian ordered.

"No, I don't. Chen Hao stopped.

The entrance to the mine had already been sealed with a thick layer of earth by his order, and it was guarded day and night. Chen Hao knew that Wang Qinian wanted people to take a shovel to open a passage, but in fact, he didn't need it at all.

There are wall piercing techniques in spells, and movement techniques in spells, etc., all of which can pass through a certain degree of ordinary obstacles. Chen Hao didn't know these techniques, but his "Taiyi Concealment Technique" could completely pass through the soil layer.

Taiyi's Concealment Technique is not an ordinary method of invisibility, but turns the entire body into an imperceptible mist. This kind of mist, which is so thin that ordinary magic can't detect it, has no problem trying to pass through a mound of dirt that has no special prohibitions.

Although the mound of earth appears to be compact, it is actually filled with countless holes for the subtle mist that can seep through.

Under the admiring gaze of Wang Qinian and the guards of the mine cave, Chen Hao inspired the Taiyi Concealment Technique. For Wang Qinian, he didn't know what kind of technique Chen Hao used, because Chen Hao suddenly disappeared in front of their eyes, and it looked no different from the wall piercing technique.

Feeling his body passing through the mound, Chen Hao's eyes were dark, but he didn't feel depressed.

The entrance to the mine is wide and tall, so if you want to block it tightly, the thickness of this mound is not small. After walking forward for a long time, Chen Hao felt that he had passed through the soil layer. Because although it is still pitch black in front of me, it is lighter than the darkness in the soil.

He stopped his invisibility and cast an illumination spell on himself, and the soft light reflected the scene in the cavern.

At the entrance of the mine, the spirit stones had already been hollowed out, so Chen Hao started by sending Xiao Yi to the deepest part of the mine. He followed the route he remembered, through the crumbling cavern, over the rotten, moldy supporting wood, and into the depths of the cavern.

When he saw that there were traces of new excavation on the cave wall, Chen Hao knew that Xiao Yi should be near here.

He took out Xiao Yi's natal spirit, held it in his hand, and stimulated it quickly and lightly with his aura.

In less than a moment, a large group of black worker ants poured out of the old mine cave and the newly dug cave, surrounding Chen Hao!

"Xiao Yi, your shelf is quite big. Chen Hao smiled faintly.

"Master, how dare Xiao Yi put up a shelf in front of you?" Xiao Yi flew low from behind the worker ant colony with a flattering smile on his face, but his eyes were firmly fixed on his natal spirit.

Chen Hao didn't care, casually threw the natal spirit back into the storage bag, and said to Xiao Yi: "Are you satisfied with this new home?"

"Master, you are so good to me, I have never seen so many spirit stones!" Xiao Yi said excitedly. However, it looked at Chen Hao again, lowered its head and said, "If only the master could be by my side, I am very uneasy when I leave the master." ”

"Haha, you're uneasy when you leave your natal spirit, aren't you? Don't worry, I'll keep it well, and I won't break it. ”

"But I still want to be with you. Xiao Yi said.

"If we can't get out of the White Horse Cave, we're all going to be finished. Sooner or later, the Cao family will break through the Overwatch Valley, and it is impossible to hold on to it forever. So let's get down to business now, have there been any changes in your abilities, and what kind of soul-eating ants can hatch from the eggs you lay?"

Chen Hao is no longer idle, the purpose of his coming here is to formulate a reasonable development plan for Xiao Yi and produce the most suitable soldiers.

In terms of quantity, Xiao Yi, an ant king, even if he keeps laying eggs, is definitely not as fast as the reproduction speed of countless demon beasts and spirit beasts in Plains City.

Therefore, relying on the number of crushing, it will not work against the Cao family, which was originally based on the number of crushing!

Then focus on cultivating soul-eating ants with suitable functions, and cooperate with the hole cards in Chen Hao's hand to play the greatest role, so that the Cao family can have some chances of winning.