This is a tunnel dug manually, and there are obvious sharp chisel marks on the top and both sides of the tunnel.

The width and height of the tunnel are almost 3 meters, and the shape is regular. There are even traces of wheel ruts on the ground.

Tang En suddenly fell into the tunnel while walking around underground just now, and he was slightly startled at that time.

"Let me go, is this a tunnel dug by an underground race or some other race?" Tang En was very confused as he looked at the dark unknown land at both ends of the tunnel.

I casually touched the ground and found that the dust on the ground was relatively thick. It was obvious that no one had been here for a long time.

Tang En released his senses and sensed his surroundings. The tunnel was extremely quiet. Except for the occasional sound of debris falling from the upper wall of the tunnel, he heard no other sounds.

However, to Tang En's expectation, the air in this tunnel was actually quite fresh, but he did not feel the flow of wind.

After thinking about it, Tang En randomly chose a direction and rushed forward quickly. He was ready to see where this inexplicable tunnel led to.

The tunnel is very long, but there are often turns and ups and downs, so it is not convenient for Tang En to fly in it, so he can only run with his legs.

However, after running at Tang En's speed for an hour, the tunnel still did not reach the end. During this period, except for the occasional expansion hall, he did not find any special discoveries. He did not even see the tools for digging the tunnel or the accumulation of earth and rocks.

"It's really strange. Who dug such a weird tunnel underground? What is its purpose?"

Tang En patiently continued to explore, and after running for another half an hour, he finally reached the end of the tunnel in this direction.

The exit on this side of the tunnel is not on the ground. It is still underground. It is a cave about the size of two football fields.

After searching around the cave, Tang En gained something this time.

Tang En discovered that this cave was actually a section of a certain underground river that had dried up. The tunnel entrance was equivalent to opening on the side of the river.

In addition, in the middle of the cave, Tang En discovered a broken magic array with a diameter of nearly 10 meters that was covered by floating and sinking.

After investigation, it was found that this magic array was deliberately destroyed, and the nodes and most of the magic tracks on it were destroyed. However, Tang En still found some clues from the wreckage, and he believed that it was the remains of a teleportation array.

Feeling the breeze blowing from the upper reaches of the dry river, Tang En thought for a moment, and then rushed towards the cave wall with a slight green light. He was not going to continue exploring the areas of the underground river. He planned to go to the other end of the tunnel to see

Look what these diggers are looking for.

After rushing out of the ground, Tang En found his current location. He had been there before when he was looking for magic materials. It was actually not far from the location where he had just dived to prospect.

"Well, it seems that the tunnel is actually a large arc path underground, but why not a straight line?" Tang En flew towards the place where he entered the tunnel before with doubts.

In order to verify a guess in his mind, he flew in a straight line and sneaked into the ground several times to explore.

When he stood again at the position where he first entered the tunnel, Tang En came to a conclusion: the other party might be searching for something buried underground, but it was definitely not minerals or magic materials.

Because, down here, Tang En did not find any mineral magic materials worth using.

Next, Tang En continued to explore along the other end of the tunnel. After running for almost half an hour, the tunnel here ended. However, he also found the purpose of digging the tunnel - a strange city ruins that seemed to be embedded in the rock formations.

.

"Is this... the dragon city of Damut?"

Seeing a strange roof that resembled the style of Demter City in Mekensmudi's memory, as if growing out of the rock, Tang En felt a strong excitement rush to his head.

It took less than ten minutes for Tang En to circle around the ruins underground. He discovered that the ruins of the city embedded in the rock formations were not large. They seemed to be just a certain part of the city. Moreover, the place was already devastated, and was everywhere.

Dig out the broken pieces.

"Damn it, these idiots digging holes have made this place a mess."

Tang En cursed and searched in the ruins for a long time. Although it was confirmed from a stone slab with the words 'Damter Street Security Office No. 3' engraved on it that this was the main city of the dragon people 2000 years ago, after walking around the entire ruins,

He never found anything valuable again.

"Damn it, this place must have been screened by the real owner, and no good things were left for me."

"However, Demter City should be bigger than this. Could it be that after a powerful guy tore the city apart, it was integrated into the underground rock formation through rules? However, this place is under Baigai Mountain..." Tang En

Suddenly I thought of the legendary sixth-level true god in this world.

Tang En, who flew out of the ground again, looked at the surrounding environment. He felt more and more horrified by the people who drove Damt City underground. If you want to make the buildings grow as if they were growing in the rock formations, it cannot be achieved by simple rules.

.

Afterwards, Tang En, who was not determined to give up, flew another section to the Garnier Mountains south of the Baigai Mountains. Occasionally, he would sink underground to look for other ruins that might exist in Damut City.

But this time Tang En made no such discovery, but he did accidentally discover an exploitable magic iron ore area during this period. In addition to magic iron ore, the veins were also accompanied by many other types of minerals.

An underground space was dug in the mining area, and Tang En kept Crodo, the two digging puppets, and two new puppets that were specially made for mining and smelting and had not yet been fully debugged.

After leaving some magic tools behind and letting Crodo lead the puppets to mine, Tang En returned to Malani City.

After leaving home early in the morning, it was already sunset in the afternoon when I returned to the Master's Mansion in Malani City.

As soon as they landed in the courtyard, the lively Akasha came out and said, "Lord Lauente, Princess Neveu came to see you this morning~"

"Oh, Neve is here, did she say anything?" Tang En nodded to Akasha, and then walked to the lobby on the first floor.

"Princess Neveu said that she was going to pick up her teacher, and they might arrive in Malani City tomorrow." Akasha quickly followed Tang En and reported.

"Oh, that's it. It's okay. I won't go outside tomorrow. I'll wait for them at the Master's Mansion." Tang En said easily.

Then a fat magical beast that was nearly 2 meters long, with smooth and oily fur and two large fangs suddenly appeared in Tang En's hand.

"Ah~"

The monster suddenly appeared with such terrifying aura that Akasha screamed.

"Oh, hahaha~"

Tang En turned around and saw Akasha's frightened look. He gloated and said with a smile: "This is dead, what are you afraid of, stupid Akasha, haha~"

"Ah, Master Lauente, you are so bad, you always love to tease people!" Akasha wrinkled her nose and stuck out her tongue at Tang En, who had a nasty smile.
Chapter completed!