Chapter 306

The jade slips said that to open the iron box, you can't use force, otherwise the iron box will explode, not only the treasures inside will be destroyed, but also the prestige created by the self explosion of the iron box is not weaker than that of a monk in the later period of the true devil.

If you want to open this iron box, you need a key, but there is no ready-made key, and the friar can only make it himself.

However, the structure of the key is extremely complex. There are tens of thousands of holes of different sizes and hundreds of thousands of sawteeth with different shapes. Each of them must meet the requirements. As long as any one is wrong, it is impossible to make an iron box key.

Xiao Lingyu is so angry that he just wants to curse his mother. Although he can make such a key, it will fail countless times, which will consume a lot of time and energy.

If the key cannot be made successfully within eight years, Xiao Lingyu must leave immediately. According to his refining level, it is very likely that he will not be able to complete the refining of the key within eight years.

After thinking about it, Xiao Lingyu still felt that it was meaningless to waste time refining the key. The things in the treasure box might not be useful to him, so he gave up refining the key first and looked for a way back in the corridor.

There were stone walls on three sides of the corridor. Only the direction facing the stone table could not see the end of the passage, so Xiao Lingyu walked quickly over there first.

The corridor was very long. It took Xiao Lingyu a full month to reach the end, but the end was a magic cave.

The devil's cave does not extend in a straight line, but twists and turns, with an endless appearance.

Xiao Lingyu walked in the tortuous devil's cave for more than a month, but he didn't come to the end of the devil's cave. He hesitated for a long time. He didn't give up and still insisted on moving forward.

Although the devil's cave is tortuous, it has no bifurcation. There has always been only one way. Xiao Lingyu estimates that this is not a maze.

But what Xiao Lingyu didn't expect was that two years later, he was still in the devil's cave, and the devil's cave had no end at all.

Xiao Lingyu left special marks on his way, just to prevent him from going the same way again, but he didn't meet those marks again.

"This should not be the way out. I have to go back and find a way."

Xiao Lingyu thought it was impossible to go on like this, so he turned around and rushed back.

The special marks left along the way were still there, proving that Xiao Lingyu was not circling around. Because he was on his way at full speed when he went back, he returned to the corridor again in only half a year and came to the stone table.

After carefully checking around again and again, Xiao Lingyu still got nothing and was even more depressed.

"It seems that only by making the key and opening the iron box."

In desperation, Xiao Lingyu began to refine the key according to the records in the previous jade slip.

Xiao Lingyu has a lot of materials needed to refine the key, because many kinds of materials can be used for refining, and as long as the refining is successful, the iron box can be opened. There is no difference between what materials are used.

It used to be nearly eight years, but now there are only five years left. Moreover, even if the key is refined, there may not be a way to leave here.

A year later, Xiao Lingyu refined the first key, but failed to unlock it.

Refining again, due to some proficiency, the refining of the second key took only more than half a year, but it still couldn't unlock successfully.

Xiao Lingyu was not in a hurry, but carefully recalled the two refining processes to find the key to his two failures.

The third key took only half a year, but the result was the same... Unable to unlock.

Three times of refining took more than two years, but such fine refining also improved Xiao Lingyu's refining level.

Moreover, Xiao Lingyu also found that if he kept refining that complex and strange key, it would be a shortcut to quickly improve his refining level and skills, and at least improve his soul's computing power.

The fourth refining took only three months. Although Xiao Lingyu felt that there were no mistakes in the refining process, the result still disappointed him.

Continue refining

When Xiao Lingyu failed for the tenth time, he had been in the East pole demon cave for nearly ten years. If he could not leave, he had to wait until the next time the demon cave was opened. This was an unacceptable result for Xiao Lingyu.

In this way, Xiao Lingyu naturally had the idea of directly destroying the iron box. After all, although the self explosion of a real demon later expert is strong, Xiao Lingyu may not be unable to carry all the protective means.

"Eh?"

Just as Xiao Lingyu was determined to do it and was ready to take out the silver moon broken knife, a low voice with strange meaning came over.

Xiao Lingyu was thinking about things just now, and there were no abnormalities here for many years, which made him relax his vigilance. Therefore, he didn't notice anyone approaching just now.

Of course, it may also be that the level of the visitor is too high. Xiao Lingyu's thoughts that have been swimming around can't detect the breath of the other party.

Hearing the sound, Xiao Lingyu trembled in his heart. When he recovered, he turned around, but saw an old man in a dusty robe coming slowly from the opposite side.

Xiao Lingyu just glanced, and there was an early warning in his mind. He couldn't see each other's cultivation and realm, and the faint smell on each other's body made his mind floating outside feel dangerous.

The realm of the newcomer must have exceeded the true magic period. At least he is also an early master of spirit and magic.

When you think of the rumors of the East pole demon sect, Xiao Lingyu can actually determine the identity of the visitor. The other party is likely to be the supreme elder of the East pole demon sect and the only master of the spirit demon period of the East pole demon sect.

"Boy, Xiao Lingyu, the Royal beast Hall of the East pole demon sect, meet the elder." Xiao Lingyu saluted respectfully with his fist when he thought of the identity of the other party.

Not that he respected or feared the old man, but that he estimated that the old man might have a way to take himself out.

"You are a true demon cultivation achievement. Why haven't I seen you before? Have you just been promoted? Or have you just joined the East pole demon sect?" the old man walked slowly and asked in confusion.

"Boy, I just joined the East pole demon sect." Xiao Lingyu replied calmly.

"With your accomplishments in the period of true magic, how can you be in the beast hall? Even if you are in charge of the beast hall, you are a little overqualified?" the old man asked again.

"If the clan makes such arrangements, the boy will obey." Xiao Lingyu said perfunctorily.

"I think your realm is only the early stage of the real devil, but your breath is not weaker than the later stage of the real devil. No wonder you can come here."

The old man first made a judgment, then pointed to the iron box and said, "haven't the keys been refined yet?"

Xiao Lingyu shook his head with a bitter smile and replied, "the key structure is too complex. The boy didn't have much refining experience before. Now he has entered the East pole demon cave for nearly ten years and still hasn't refined the key."

"It's nearly ten years... It's too late to go out again." the old man frowned and said.

"I'm lucky to meet you today. Please teach me how to go out." Xiao Lingyu said sincerely.

"If you want to go out, you must open the iron box before the ten-year period, otherwise you can only wait for the next time. However, since you have the cultivation of true magic period, it's good to wait here for a few more years. As long as you can successfully refine the key, your refining level can rise a lot." the old man said carelessly.

"Boy, there are still some things to do outside. I really don't dare to stay here for a long time." Xiao Lingyu shook his head and said.

"Hehe, how about this? I'll help you refine the key. You can go out in time. What about the things in the iron box? The old man hesitated first, and then asked with a smile.