"It's saltpeter, and if you add sulfur and charcoal, it can cause an explosion and make a very powerful bomb. Lu Cai said.

"Is it like a light bomb?" Wang Baoyu was interested.

Lu Cai shrugged his shoulders and waved his hand: "It can't be compared, this is just the most primitive bomb, and the light original bomb is the most high-tech product." ”

"Can we make a light bomb too?"

"Hehe, it's not impossible to have the perfect cooperation between the king and me. ”

"Okay, I'll pay attention, how is the development of strong magnets?" Wang Baoyu asked again.

"We're trying to figure out how to pool the magnetic force into a single point. ”

"Lu Cai, don't think on your own, communicate more with the mage masters, and learn to gather everyone's wisdom. ”

"They don't understand technology. ”

"Everything is of the same origin, but in different ways. ”

Lu Cai nodded again and again, and then walked away, Wang Baoyu went upstairs to see Mantong, it was a pity that Mantong had never seen saltpeter, and even said that this substance may not exist at all on the Lingyan Continent.

"Baoyu, this primitive thing, is likely to be a medicinal herb, ask the old immortals, maybe you can get enlightenment. "Full aisle.

Mantong's suggestion was right, and in Hua Tuo, Wang Baoyu got the answer.

"Saltpeter is a medicinal herb that can repel insects, but the geographical structure of the Lingyan Continent is different, so I am afraid it is difficult to find. Hua Tuo said.

"Is there an alternative?" Wang Baoyu asked.

"There is also a way, it is more cumbersome, under the old house, there must be nitrate insects, this insect can be cultivated, and saltpeter can be born. Hua Tuo said.

Easter Island is uninhabited, and there are no old houses to be found, and the soldiers' houses are all made of green wood, which will not rot easily, and the matter of finding nitrate insects can only be put on hold for the time being.

In the blink of an eye, it was half a year, Xuanyuan Ling and other monks officially entered the Yuan Infant Period, and the Yuan Infant Stage monks in the team quickly expanded to forty-five people, and the old immortal Hua Tuo made great contributions.

Lu Cai continued to consult Mantong, and with the help of Qiu Hong and others, he finally completed the creation of a strong disk.

This is a combination of metaphysics and technology, driven by true qi, the strong magnetic array quickly reaches a fixed position, and then accurately converges at a single point.

"Hehe, King, let's check the weapon I've developed!" Lu Cai sent out an invitation.

Wang Baoyu led a group of dignitaries to a clearing on the island, where Lu Cai held a strong disk in his hand, arrogant, like a great monk.

"How to use it?" Wang Baoyu asked.

"It's very simple, the anode is the emission, the cathode is the absorption, and I made a tolerance so that the two don't happen at the same time. Lu Cai said.

Wang Baoyu was confused, took the strong disk, and started the test in person. The iron needle in the center was aimed at a tree at the top of the hill.

After pouring the true qi into the absorption hole of the strong disk, the ring-shaped stone containing strong magnetism quickly fell into place, and no mana penetrated out, but the effect produced was quite amazing.

The big tree with a thick bowl mouth on the top of the mountain suddenly disappeared, and under the impact of strong magnetism, it was uprooted, and I don't know how far it was thrown out.

"King, cool, right? It's just a launch, try to absorb it again. Lu Cai was so happy that he couldn't close his mouth.

Wang Baoyu flipped the strong disk over, aimed the central iron needle at another tree, and once again infused the true qi into another hole.

The strong disks quickly rearranged and combined, and there was no sound, but I saw the big tree suddenly fly towards me.

As soon as the true qi was harvested, the big tree fell at his feet, and the roots were still covered with dirt.

Shen Wanfang and the others didn't react much to this, with the cultivation of the Yuan Infant Stage, they could do this by raising their hands, why bother to build such a strange disk.

Wang Baoyu doesn't think so, the valuable thing about a strong disk is that you don't need to rely on cultivation, and when you fight in the future, you can completely attack the enemy invisibly.

"Lu Cai, what kind of effect will it have if the strong magnet is aimed at the monk?" asked Wang Baoyu.

"Hehe, it's hard to say, and I don't dare test it. Lu Cai scratched his head and said.

"Mo Qiang, Mo Zhuang!"

"The subordinates are here!" said the two brothers in unison, "We are willing to try for the king." ”

Wang Baoyu laughed, shook his head slightly, and ordered, "You go and catch a second-level demon beast." ”

On Easter Island, not a single demon beast is missing, and the first- and second-level demon beasts have long fled to the edge of the area when they feel the threat of the Great Monk.

Mo Qiang, Mo Zhuang flew out, a moment later, chasing a four-eared dog to rush back, in the past in Qingchuan City, everyone saw the four-eared dog, all panicked and afraid, now, the four-eared dog behaved, but like a lost dog.

Wang Baoyu aimed the strong disk at the four-eared dog, and the strong magnetic emission was emitted, and in an instant, the four-eared dog was knocked out of a thousand kilometers away, got up and ran away.

Everyone couldn't help laughing, Lu Cai was a little embarrassed, this attack power was too weak, and even a second-level demon beast couldn't be killed.

However, Wang Baoyu praised Lu Cai, and at the moment when the strong magnet came into contact with the four-eared dog, he had already felt that the mana around the four-eared dog was imprisoned.

Although it is only a short second or two, it can often be the difference between life and death in the battle of monks.

"Lu Cai, you did a great job, tell me, how can you continue to increase the magnetic launch?"

"More strong magnetism, of course. ”

"Everyone listened, in the future, everywhere you go, you must pay attention to the magnet, and once you find it, report it to me immediately. Wang Baoyu commanded.

Everyone agreed in unison, and Wang Baoyu then conducted a series of tests, and roughly estimated that at present, this strong disk can only affect third-level demon beasts at most, or Jindan stage monks.

"From today onwards, this magic weapon will be called the Great Compass!"

"Haha, this name is domineering enough! Lu Cai was recognized by Wang Baoyu and was full of confidence.

The power of science and technology is gradually emerging, and the role of the Great Compass in the future is far beyond imagination, and mortals are creating miracles and changing the historical course of the Lingyan Continent.

After returning to Yuqing Palace, Xia Yida lazily came down from upstairs and gently put his jade hand on Wang Baoyu's shoulder, "Baoyu, I plan to pay for you again tonight." ”

"No need, I still have a lot of starlight power!"

"You can't just think about yourself, a selfish man, don't you want to have a good time?" Xia Yida came to touch Wang Baoyu's face again.

"Let's not do this!" Wang Baoyu said, but did not push her hand away.

Syllable!

With a crisp sound, Xia Yida screamed and retracted his hand, and there were several red marks on the back of his white and tender hand. Wang Baoyu smiled, it was the invisible Xiaobai who took action for him, and unceremoniously slapped Xia Yida.

"Okay, to tell you the truth, I'm about to upgrade, fifth-level Shura, help me protect the Fa!" Xia Yida pouted.

"Hehe, this must be fully supported!" Wang Baoyu nodded with a smile.

"Let's just say you're selfish!"

"I'm selfish for everyone. ”

"Don't forget, we'll see you tonight. By the way, don't take Xiaobai with you!" Xia Yida chuckled and went upstairs.

Tian Ying happened to come back from practicing the piano outside, and when she saw this scene, she lowered her head shyly.

"Yingzi, has there been another breakthrough?" asked Wang Baoyu.