"I didn't expect there was a passage in this pile of rocks. If it were an ordinary player, he would definitely regard the place where the demon boar king was refreshed as the end of the wild boar mine cave. He would never come to this pile of rocks." Tian Kuang glanced at it. The cave was only more than two meters high. It was quite spacious if one person entered and left, and the two of them felt a little crowded.

The place was too narrow, so Xiao Ling and his men could only enter the tunnel one after another.

The mine was a little dark and damp, and a lot of water was seeping out from the cracks in the rock wall. A faint and warm white light lit up, and the staff in Tian Kuang's hand emitted a soft white light, illuminating the entire tunnel.

Under the illumination of white light, when Xiao Ling saw the reflections of white, gold or blue on the rock wall, he was stunned. Could it be that there are ores on the rock wall? According to the brightness and chromaticity analysis of these reflected lights, and referring to the description of ores in the mechanical alchemist's special practice, these ores should be the companion ores of mitrilsil, blue gold and black gold.

"These stones should be ore, right?" Tian Xin leaned over a stone on the rock wall and looked carefully and said.

"Yes, this should be a companion mine." Xiao Ling replied.

Hearing Xiao Ling's answer, Tian Kuang was also a little curious: "Accompanimental ore? What ores are produced here?"

"According to my guess, there should be mitsilver, blue gold and black gold, I'm not sure if there are any other metals." Xiao Ling's answer made Tiankuang, Lin Fei and others gasp. Needless to say, Misilver, each rare first-level metal, can be sold for about five or six gold coins. As for blue gold and rare second-level metal, it is rare on the market. The price of each blue gold metal ore is as high as thirty gold coins. As for black gold, rare third-level metal, only NPCs are sold, and the NPCs are sold at one hundred gold coins.

"What a valuable rare mining area!" Tianfei couldn't help but say, the stone wall was covered with gold coins.

Xiao Ling planned that if time is free in the future, he could make a lot of money by mining here. However, if you want to enter this tunnel, you must first pass through the area where the Demon Wild Boar King is. If you want to come here in the future, you must first kill the Demon Wild Boar King, which is also a very depressing issue.

The group walked towards the distance, and Tian Kuang couldn't help asking, "Do you want to dig some ore before leaving?"

Xiao Ling shook her head: "Don't hurry, let's talk about it later." Xiao Ling had his own plans. Xiao Ling was sure to win the demonic eyes of the demon wild boar king. He would come back in the future. It would be okay to go here to mine again. Moreover, it is so hidden here, so there is no need to worry about being discovered by other players.

Tian Kuang nodded, and the group walked towards the end of the tunnel. After walking in the narrow tunnel for half an hour, they finally saw the end of the tunnel. On the stone wall next to it, there was a thick black iron gate, which was a long time ago, and the iron gate was full of mottled rust.

Lin Fei looked at the map and said, "It should be here."

Tian Kuang pushed the iron door, but the iron door didn't move at all, and he didn't know how thick the iron door was. "How to open it? Is the opening method written on the map?"

Lin Fei looked through the map carefully, shook her head and said, "No."

Xiao Ling opened some rust on the door. There was a place on the edge of the iron door that was not rusted, but a circular pattern was carved, and the circular pattern contained some regular geometric figures.

It's a magic circle! But Xiao Ling has never studied anything like a magic circle, so he doesn't know what this magic circle represents. Xiao Ling said to Lin Fei: "Please take the map and show it to me."

Lin Fei handed the map to Xiao Han, looked at the graphics on the iron gate and said, "This pattern should be a magic circle, right? It seems that we have to learn more about magic circles and runes. Otherwise, when we encounter these things in the future, we will know nothing about it, and it will be troublesome to learn it again."

Lin Fei's words aroused Tian Kuang's thoughts. The six technologies of magic array, runes, refining arrays, totems, heraldry patterns almost ran through the history of the Enzes Continent and derived the entire technological civilization of the Enzes Continent. In the future, whether it is taking risks or killing the boss, you will inevitably encounter these things. It seems that it is necessary to make up for such knowledge.

Xiao Ling was the same. He originally thought that as long as he learned runes and array refining well, there would be no problem with engineering manufacturing. Now he found that although all technologies have their own development history, they have also penetrated each other. It is not enough to just learn one or two of them well.

Xiao Ling compared the magic array graphics on the map with the graphics on the iron gate. Xiao Ling did not understand the magic array and could only apply some principles of runes. In fact, the development of runes and magic arrays to this day, many principles are common. Although only a little bit of a clue, Xiao Ling found that some places of the magic array graphics on the map and the magic array graphics on the iron gate are mutually in line with each other. Could it be a pair of magic arrays that solve each other?

Thinking of this, Xiao Ling took out the carving knife, gestured on the magic circle on the iron gate, and then began to carve the magic circle graphics on the map into the magic circle on the iron gate in proportion.

Tian Kuang and others opened their eyes wide and looked at Xiao Ling's movements, full of curiosity. For them, magic circles, runes and other things are quite mysterious, and it is impossible for people who have not learned the technology of the Enzes Continent.

While engraving, Xiao Ling became more confident in his thoughts, because the two figures were completely in line with each other, and it seemed that this figure was the key to opening the iron door.

When Xiao Ling carved the last pattern, a light blue light filled the entire magic array along the patterns of these magic arrays. The magic array emitted azure blue light, dazzling.

Immediately afterwards, the iron door started to move and slowly opened inward.

Xiao Ling, Tian Kuang and others were extremely happy. Unexpectedly, this magic circle could be used as a lock. Tian Fei and Tian Xin were amazed and suddenly became interested in the magic circle. These little things seemed to be very interesting.

"I'll go in and take a look first." Lin Fei said, sneaking into the room. After a while, Lin Fei's voice came: "Come in." He seemed a little disappointed in his tone.

Xiao Ling, Tian Kuang and others walked into the room. The Redra's stick in Tian Kuang's hand illuminated the whole room. This was a small stone room, with only a stone bed, a stone table and a few stone benches. It was extremely simple. A few clothes were thrown on the stone bed. Lin Fei touched the clothes, and the clothes instantly turned into ashes.

"I said that this old man couldn't leave us any good things." Tianxin said with some depression.

Everyone searched but found nothing.
Chapter completed!