"Three months is a lot, but it's not much...... Hurry up!" Wang Baole sat cross-legged in the cave, and after carefully deducing the echo pattern of the Vulcan cannon, his expression slowly revealed firmness.

"Just choose the Vulcan Cannon!" Wang Baole took a deep breath, immediately took out the jade slip, and began to frame the back pattern of the miniature version of the Vulcan Cannon, although there is a reference, but after all, this is an improvement, and the difficulty is not small.

Fortunately, Wang Baole is very familiar with the echo pattern of the Vulcan Cannon, and through the previous fortress battle, he has improved the Vulcan Cannon many times, and is extremely familiar with every part in it.

"The Vulcan cannon I want to make can't be too small...... Otherwise, the power is not enough, and it is difficult to put it together......" Wang Baole grabbed his hair, pondered, and gradually adjusted his thinking.

"I can't think too much about the Vulcan Cannon, all I have to do is use it as a prototype and use its echo lines......"

Time flickered, and three days passed.

In the past three days, Wang Baole forgot to sleep and eat, constantly framing and reshaping, and finally outlined the appearance of the Vulcan cannon he wanted to make in his mind.

Its appearance is very different from the Vulcan Cannon, to be precise, it looks more like a bazooka.

Looking at the sketch he drew in the jade slip, Wang Baole's expression showed satisfaction, and he began to deduce the echo pattern according to his sketch and the power he wanted to show, and all kinds of whimsical ideas continued to burst out and collide in his mind.

It wasn't until a few days passed that Wang Baole, who was immersed in the transformation of the Vulcan Cannon, also showed exhaustion, and then ended the deduction of the back lines.

It's just that the back pattern here, with the help of the back pattern of the Vulcan cannon, he has deduced more than a million ways, and these back patterns can't be completed in one spirit treasure with his cultivation and the attainments of the magic soldier.

"It takes seventy-eight spiritual treasures to combine to form my structure...... Wang Baole rubbed his eyebrows, took out a bottle of ice spiritual water and drank it, rested for a while, and started work again.

This time it took the longest, and he needed to strictly follow the requirements of his own planning to make seventy-eight pieces of spiritual treasures with different appearances, different back lines, and different effects.

And there can be no mistakes, it must be completely in line with his sketch structure, so that these spiritual treasures can perfectly share the millions of back lines, and when they are finally combined, they can fit each other and work perfectly.

Once it fails, it is necessary to start again to ensure that it is completely correct, and in this way, after refining for a month, Wang Baole's heart was full of excitement, and he finally refined the seventy-eight spirit treasures he needed one by one.

Even if not all of them are satisfied, this is already the ultimate that Wang Baole can do under his current attainments, and even the other spirit treasures he made before have not been as consuming his mind and energy as he is now.

For him, he had forgotten even snacks this month, and the only thing that existed in his mind was the improved version of the Vulcan cannon he had constructed.

"Next, it's the most difficult combination......" Looking at these spiritual treasures in front of him, Wang Baole took a deep breath to suppress his excitement, he understood that combining spiritual treasures together is not simply like building blocks to put together, but needs to be smelted, manipulated with spiritual power, and fused together.

In this way, while it is extremely difficult, the consumption of energy and spiritual power is also amazing, so after resting for a whole day, Wang Baole began to combine.

It's just the difficulty of combining the spirit treasures together, even if Wang Baole has expected it, but it is still quite difficult and has failed many times, especially on the fifth day, Wang Baole already has a prototype of the Vulcan cannon in front of him, and it suddenly exploded with a roar.

Under the protection of Jin Zhongzhu, Wang Baole, who avoided this wave of impact, looked at the broken Lingbao, wanted to cry without tears, and pulled his hair fiercely in frustration.

"It's because my cultivation is not enough!!" Wang Baole's eyes showed stubbornness, after these failures, he had already seen that because of the fusion of spiritual treasures, many places need spiritual power to be finely manipulated, so once the spiritual power cannot follow, there will be stagnation and exhaustion, and the combination of spiritual treasures will fail.

Even if Wang Baole surpassed the other disciples of the second layer of True Breath, he couldn't complete the combination in one go, and at this moment, his thoughts fluctuated, and after walking back and forth in the cave mansion for a few steps, he suddenly stopped.

"Only by reaching the third layer of true breath can you successfully complete the Lingbao combination!" Thinking of this, Wang Baole gritted his teeth fiercely, and when he was thinking about buying some pills, he suddenly looked down at his stomach, and after raising his hand to touch it, his eyes were full of surprise.

"The effect of those pills should not be as good as the crystals in my stomach...... Every time the cultivation is running, it will absorb some, but it is still too slow, if you can accelerate the absorption, the cultivation will definitely be able to break through!" After patting his stomach, Wang Baole immediately sat down cross-legged and took out the spiritual treasure that Chen Yutong gave him to deceive his brain.

Without hesitation, Wang Baole immediately put this spiritual treasure on his head and gave an order.

"I'm seriously injured and need nourishment...... Wang Baole finished speaking, and the helmet-like spirit treasure he was wearing suddenly shook, as if an electric current had entered his head, but it sank into the sea and didn't react much.

Wang Baole waited for a long time, a little helpless, and tried to run, hunger and other instructions, and found that all failed, his eyes widened, this is to force me to magnify the move.

"I'm pregnant again!!" As soon as this sentence came out, the Lingbao current was obviously very large, but before Wang Baole could be happy, this current lost its effect again after it was transmitted to the brain.

This made Wang Baole dumbfounded.

"Is it because I have lied to my brain too many times? All the brains have already developed resistance, and they don't believe me......" Wang Baole gasped when he thought of this, and was shocked by his own guess, which was incredible, and at the same time, he couldn't help but feel a little embarrassed, after all, ...... His brain doesn't believe in himself, this kind of thing feels too strange to him, and at the same time, there is also a sense of strangeness.

"This won't work...... Wang Baole was helpless, opened the spirit net and looked at the pills sold on it, but after looking at it for a long time, he didn't find the pills that had no side effects and could break through in a short time.

Most of them are relatively mild, and they need to be taken for a long time to improve their cultivation, as for the pills that Wang Baole needs, it is not nothing, but they are hard to find.

Considering that there were less than two months before the big exam, Wang Baole was anxious, and even went to contact Little White Rabbit and Du Min, but Little White Rabbit seemed to be still in retreat and did not respond, as for Du Min, there was a reply, but it was a very direct "no".

Just when Wang Baole was thinking about asking Chen Yutong, he suddenly had a flash of inspiration and remembered that when he was pulling out the teeth of the fierce beast in the fortress before, he had been electrocuted, causing the crystals to decompose a little.

Thinking of this, Wang Baole's eyes lit up suddenly, and he immediately took out the dream pillow, entered the dream world, found the young lady, and asked to be electrified......

Under the strangeness and surprise of the young lady, lightning flew sideways......

But after being electrocuted a few times, Wang Baole, who was screaming, found in despair that it was ineffective.

"That's not right...... Could it be that the electricity in the dream has no effect, and it needs to be in reality?" Wang Baole muttered sadly and angrily, he felt that he felt like death if he went on like this, but when he thought of the soldier's assessment and the position of the person in charge of the hospital management department, he was about to go to the lower courtyard island to find a cable to try.

But at this time, the mask lady gave Wang Baole a proposal.

"Perhaps, you can try the power of the void thunder and lightning, this kind of thunder and lightning contains a certain law, compared to the electricity you create...... It's even more bizarre!"

"Thunder and lightning?" Wang Baole was stunned for a moment, and after leaving the dream world, he thought for a long time, and thought of what Lu Zhangyuan had said in the Lower Courtyard Island, in the Formation Pattern Pavilion, there was a Thunder Realm secret realm open to all the disciples of the Upper Courtyard Island!

After becoming a disciple of Shangyuan Island, although Wang Baole had never been to this Thunder Domain Secret Realm, he had also seen others discuss it on the Spirit Net, and knew that the so-called Secret Realm was actually a fragment of a complete bronze sword.

This fragment is buried there, and it contains a thunder inheritance on a bronze ancient sword, which is divided into five parts, that is, the five magic secret techniques.

"These five spells are...... Arc, Thunder, Instant Sword, Dragon Blaster, and ...... Prison Sea!" Wang Baole narrowed his eyes and whispered in his heart, he knew that if someone could master all these five techniques and fuse them together, it would be a complete inheritance.

This complete lineage, similar to some kind of extremely harsh climate in the Federation, is called ...... Thunder Magnetic Explosion!

Weighing it in his heart, Wang Baole's eyes showed decisiveness, he knew that he had no time to delay, and he had to cultivate as soon as possible to break through the second layer of true breath and reach the third layer of true breath.

In this way, he could smoothly combine seventy-eight spirit treasures to form his own ...... An improved version of the Vulcan cannon to conduct your own soldier assessment!

"There shouldn't be anyone dead!" Wang Baole shook off his hesitation, and after making a decision, he immediately left the cave, took out the water drop airship, and flew out of the Magic Weapon Pavilion in an instant, heading straight for the Formation Pattern Pavilion.

The speed of the water drop airship was amazing, and soon Wang Baole arrived at the Formation Pavilion and went straight to the secret realm of the Thunder Domain.

The Thunder Realm Secret Realm was built on a hill in the Formation Pattern Pavilion, where seven or eight huge cyan stones were erected, and in the middle was a circular formation.

Therefore, the place is open, so there is no one to guard, as long as anyone registers, they can go in to get the opportunity, and with the help of the power of the formation, this place can form a protection, once the disciple encounters danger inside, he can teleport back instantly.

When Wang Baole came here, it was already dusk, although there were people in this thunder realm secret place, but there were not many, Wang Baole did not delay, he registered immediately after approaching, and then stepped directly into the formation, with a flower in front of him, when it was clear, he had already appeared in another space.

The sky here is dark, and there are tall towers erected on the earth, these towers seem to be made of metal, like the tip of a sword, as far as the eye can see, there are thousands of such towers on the ground, and there is a sound like a roar of thunder, roaring in the sky, and when you look up, you can see that in the dim clouds, there are irregular lightning bolts, are frantically wandering and chasing.

From time to time, it fell, bombarding the tower on the ground, making the tower tremble, and from a distance, the lightning falling was like a thunder dragon, which was extremely shocking at the same time, and it was more like a catastrophe.