After resting for a while, Xiao Chen and the others continued to walk forward.

Xiao Chen followed the mana fluctuation this time to find the past...... "Well, it seems that there is a mana fluctuation." After walking through a few corridors, not only Xiao Chen, but others also began to notice mana fluctuations.

Everyone was in good spirits, and at the same time vigilant, it was very boring to walk for such a long time, but in this underground palace, there were many dangers, and they could die at any time.

They kept approaching the place where the mana fluctuated, and finally came to the outside of a large iron gate, this iron gate was very heavy, and a very large iron lock hung on it, as if it had been countless years, and it was covered with dust.

Inside, a trace of mana fluctuations leaked through the door.

Xiao Chen and the others stood at the door, but they couldn't probe through this iron door, their spiritual power was cut off by the door.

Yali observed the iron gate and said to Xiao Chen, "Do you want to go in?"

Now, Xiao Chen has become the head of this small team with absolute strength, and Yali has left the decision to Xiao Chen.

"Of course we have to enter, we were originally exploring the underground palace. Xiao Chen's eyes were calm, and he put his hand on the iron lock.

The wind poured out of his hands, blowing the ashes off the huge iron lock.

I don't know how many thousands of years this dungeon has existed, but the iron lock that blows off the dust is still dark and faint, without the slightest trace of rust, and the iron lock, including the iron door, is depicted with many magic lines, branching like branches, layer upon layer. "Black Iron?" Toyah's voice rang out.

He took a few steps forward, looked at the iron lock, reached out and touched it, frowned, and said, "This is black iron, it is a very hard metal, even if it is a sword master, it is difficult for a mage to break it." ”

My uncle has a black iron sword, which he kept like a treasure, and it was purchased for more than three million gold coins, and no one else could touch it. A priest shouted in surprise.

Black iron is a metal of the same level as Mithril, just as Mithril is a mage's favorite, black iron is a swordsman's favorite.

"Ha, if it's really black iron, let's take away this big lock, and we can just sell it for a million gold coins. ”

"Behold this gate, it is also of black iron. The other man reached out to wipe the dust from the door, saw the essence of the door, and immediately cried out in surprise.

"Such a big door is all black iron, we have sent it, how many swords and armor can be made here, let alone tens of millions. "People who know the value of black iron are crazy with excitement.

"Alright, you guys, don't get excited, let's see if we can open this door. Ally shouted.

Although the black iron is valuable, it has not yet made Arri lose his mind.

A door made of black iron, a black iron lock, and an intricate magic pattern on it, Ali didn't think it would be easy.

"Let's see if we can open the door. Droney said.

Rumble!

A powerful fire-based magic slammed into the black iron lock, and after the smoke passed, the black iron lock was faintly there, and there was no movement at all.

Boom! Boom!

Several successive bolts of magic slammed on the lock, on the door, and there was no response.

"Don't try it, this is the underground palace of the ** master, if it can be easily blasted away by us mages, we will use black iron as a material. Toya sighed beside him.

Everyone was discouraged.

"How the hell are we going to open this door, do we have to find the key, but where is the key?" Arri muttered, looking at the door.

The dungeon is so big, and the thought of looking for the key aimlessly is almost like looking for a needle in a haystack, and the hope is extremely slim.

Xiao Chen looked at the door that had been completely exposed, the black door was tightly closed, and the magic patterns on it were so complex that they were dizzy, and at first glance it was a big deal, and it was not made by a mage-level person at all.

"Such a door, in this underground palace, and it is the assessment of the academy, I don't think the people of the academy have not opened it. Xiao Chen suddenly said lightly.

Xiao Chen's words reminded everyone, such a conspicuous black iron door, with the strength of those old guys in the inner courtyard of the academy, will it be opened to take a look?

Impossible, Yali and the others are not stupid people, as soon as they were awakened, as if they had grasped the center of gravity, their eyes lit up, and they said: "Yes, since those tutors in the inner courtyard let us use the dungeon as an assessment, they must have explored the dungeon first, and it is impossible to put the completely hopeless problem here, this iron gate, so conspicuously placed here, maybe it is one of the problems of the assessment, it must be opened, everyone think about it again!"

"The clue, for sure, is on the door. ”

Everyone looked carefully at the door and its perimeter, trying to find a clue.

Xiao Chen's eyes wandered, and suddenly his mind moved, and he closed his eyes.

His spiritual power covered the entire Iron Gate, and in his spiritual world, the Iron Gate disappeared and was replaced by a flow of energy.

Spiritual power, what he perceives is energy, what he sees is countless complex veins like human blood vessels flowing above the iron gate, and those energies, with some strange, complex, and mysterious trajectories, are running on the iron gate.

This is the magic circle.

Xiao Chen knew about the magic array, but he didn't study it specifically.

After all, the formation still requires a lot of energy, and he has always focused his spirit on the cultivation of his own strength, so he has never cultivated the use of the magic array.

But if you don't cultivate, it doesn't mean you don't know anything.

The formation also originated from magic, and the use of magic rules is also a kind of energy use.

Xiao Chen himself, in the use of energy, has incomparable talent, experience, in his previous life, he can cultivate the terrifying star power, and he himself has also controlled the energy to the extreme.

In front of him, the use of energy in this magic array is also complicated to an extremely terrifying point, layered on top of each other, or ringed, or connected, or bifurcated, like a ball of wool that cannot be sorted out.

"The person who wields this circle is strong, very strong, much better than me in terms of magical attainments. Xiao Chen said secretly in his heart.

But at the same time, Xiao Chen also had a strong sense of competitiveness.

The harder it is, the more challenging it is.

Xiao Chen began to analyze those magic patterns and energy movement routes...... Time passes minute by minute.

Just when everyone couldn't find any clues on the iron gate, and they were very frustrated, Xue Wei Xuerui first noticed Xiao Chen's strange appearance, Xiao Chen, standing there, motionless, with his eyes closed.

"Young Master, what's wrong?" Xue Wei Xuerui was a little anxious.

They screamed, but Xiao Chen did not respond.

However, Xiao Chen's breathing was steady, and he couldn't see anything unusual.

That's it, an hour, two hours...... At this time, the others were also anxious, they all looked at Xiao Chen, they had almost given up looking for clues to open this iron gate, but Xiao Chen just stood like this, facing the iron gate like a sculpture.

"Xiao Chen, what's wrong, will something happen!" Toya and the others discussed.

"Just standing, for so long, if you want to wake him up, we have to continue to look for a way out. Some of the students were impatient, if it weren't for the amazing strength that Xiao Chen showed before, they would have made a fuss.

"You guys, don't make a fuss. Gulint shouted: "There is so much nonsense, if you can't wait, go by yourself, Xiao Chen didn't ask you to go together." ”

As soon as Gulint's words came out, those students suddenly didn't dare to complain.

With their strength, they don't dare to break into the dungeon...... At this time, Xiao Chen's spirit seemed to be trapped in a labyrinth, and those incomparably complex magic circle patterns were rampaging in his mind, Xiao Chen wanted to sort out these chaotic magic circles to the limit, and understand the intention of each ring of the magic circle patterns, overlapping, crossing, and delineating, it was very, very difficult.

Fortunately, Xiao Chen's spiritual power has already reached the level of a two-star mage, and he has an incomparably strong tenacity and understanding of the subtle use of energy, so even though this magic circle is an incomparably complex ball of yarn, it has also been gradually sorted out by his trace of cocoon...... In this process of sorting out the patterns of the circle, it is painful, monotonous, and extremely boring.

However, Xiao Chen was dwelling on it, and every trace of analysis and understanding was unimaginably helpful for him to understand the use of magic.

This is the magic array diagram in the underground palace of the ** division, and it is likely to be the handiwork of a ** division.

This kind of handwriting is not something that one person can easily encounter, but to understand and analyze it, you can imagine how helpful it is for the understanding of magic.

There are many wonderful applications that Xiao Chen has never heard of, and he can find some novel applications almost every moment...... For Xiao Chen, this is tantamount to a thirsty fish falling into the ocean......" This sketch turned out to be like this, the mana turned here, producing a mana oscillation point, which just cooperated with that point to form a superposition...... This kind of use can double the mana......"

"It's not an arc of mana, it's a bit similar to my unloading, and it can unload any mana by three percent......"

Xiao Chen was analyzing the intention and use of the magic circle every moment.

This is the comprehension of the rules of magic, which makes Xiao Chen's understanding of magic more and more profound, and many novel concepts take shape in his mind.

And such a continuous huge amount of analysis also made his soul run strongly, and his spiritual power was slowly improving...... Six hours, six hours.

Even Gulint and the others were a little anxious.

"Xiao Chen, will there really be a problem! It's been too long. "Gullint and the others all had such thoughts, let alone the others.

Yali said: "I think, we still have to wake up Xiao Chen, it's not a way to go on like this!"

"This, it's up to Xue Wei Xuerui to decide. Anya said.

"Young Master, what's wrong with you. Xue Rui came to Xiao Chen, and Xiao Chen didn't move.

"Wake him up. Xue Wei Xuerui can't wait any longer.

Just as they stretched out their hands towards Xiao Chen, suddenly a magic shock came out of Xiao Chen's body, and they couldn't get close to Xiao Chen.

"How so. ”

Xiao Chen's body seemed to have formed a magical force field, and everyone was excluded.

"He's moving!"

Yali shouted, Xiao Chen did move, his hand slowly raised, but his eyes were still closed, Xiao Chen's hand came out of a trace of blue light, touched the big lock, and then the blue light in his hand shone violently.

The glaucoma and the big lock collide...... Airplanes!

The mana fluctuations on the entire big iron gate suddenly became a hundred times stronger, and everyone felt the powerful magic vibration on the big iron gate, and people retreated one after another.

What's going on?

Everyone was stunned, watching Xiao Chen stand in front of the iron door without being affected by the powerful magic fluctuations, reaching out to touch the iron lock.

A cyan stream of light spread out from the iron lock, constantly bending and twisting, running along the complex veins of the magic true map on the big iron door, this scene, weird and shocking, rotating, crossing, surrounding, a little bit of this light flow spreading, it was originally too complicated to see the array at all, under the surge of the light flow, everyone saw clearly, this array was not broken, all the complicated lines, it was a line.

Gradually, the entire iron gate was occupied by the light stream, and after completing an incomparably long and complex circle, the cyan light flow returned to the iron lock, starting with the iron lock and ending with the iron lock, forming a cycle.

When this complex cycle is completed in Xiao Chen's hands...... Click!

A crunch!

Everyone heard, the iron lock, opened...... As soon as the iron lock was opened, Xiao Chen also opened his eyes at the same time!

There was silence all around, and everyone held their breath and stared, and then their faces showed an incomparably wonderful look.

"The lock, it's open, it's open!" Muttered Arry.

Everyone woke up from a dream and screamed excitedly.

Xiao Chen put down his hand and turned around, as soon as he turned around, everyone's cheers stopped again, everyone knew that this was Xiao Chen's credit, he actually magically opened this iron lock.

And his method of unlocking, although everyone couldn't understand it, but those dizzying magic flows, and the terrifying magic vibrations on the door, all made them understand that it was definitely not a simple matter.

"Master, are you alright? Xue Wei hurriedly stepped forward and asked.

"It's fine. Xiao Chen's expression was indifferent.

But everyone felt that Xiao Chen seemed to have changed a little bit from before the lock was opened.

If Xiao Chen before the lock was unlocked, he still gave people some cold feelings, but now Xiao Chen gives people a more nihilistic and indifferent feeling, that kind of demeanor and temperament, completely not like a sixteen-year-old boy.

In front of such Xiao Chen, the people here even have a feeling of self-esteem and inferiority.

It's not about strength, even if it's a mage, almost all the students here are sword masters, but they will also feel that the strength is inferior, and they won't have this feeling of being ashamed. It was a purely soul-like feeling, just like the difference between the bloodlines of some high-level and low-level demonic beasts in the Warcraft.

Everyone didn't understand this feeling, only De Knox knew that Xiao Chen had reached a higher level in Xuan Ao's comprehension.

"Okay, don't look at me, open the door and go in, what's inside?" Xiao Chen waved his hand.

Everyone present came to their senses.

"Haha, I'll come, I'll come. Gullint stepped forward, opened the big lock, and pushed hard......

(To be continued)