Survive, the rules of rebirth for the villain witch

"What's different from last time?"

Hearing Wang Di's words, Youhuang immediately asked vigilantly.

Wang Di said solemnly, "The last batch was a failure. The second batch is not only powerful but also very durable. Last time we were held back by the demon army and almost exhausted our spiritual power."

You Huang exclaimed in shock: "Then there's no point in me coming here."

"Don't you know how to make black medicine?" Xue Zun reminded him, and You Huang immediately understood: "I know how to make it, do you have the materials?"

"Don't worry, the materials are ready, you just need to put your hands on it." Wang Di immediately put out a lot of materials from the ring: "We have tried many times, but we have never succeeded."

Saltpeter, charcoal powder, and sulfur were indeed prepared in advance.

You Huang thought for a moment and asked, "How powerful a black medicine weapon do you need to be?"

"What?" Wang Di asked in confusion.

"Do you want the demon army to die or lose their combat effectiveness?" You Huang asked in a different way.

“This can also be adjusted!” Wang Di was shocked.

"Yes." Youhuang said.

After confirming the answer, Wang Di hesitated and said, "Putting aside their positions, the soldiers are innocent, and they don't want to be transformed into the Demon Army."

You Huang said "I understand" and started to mix the black powder. He also made the fuse before he stretched out his hand and said, "Take out the oil paper. Now we are going to wrap the explosive cartridge."

"What is oil paper? What is a cartridge for wrapping explosives?" Wang Di asked in confusion.

"Senior, are you kidding me?" You Huang glanced at Wang Di and said, "You made the black medicine without wrapping it up, and just scattered a handful of it and set it on fire. Are you going to die with them?"

"Miss Youhuang, Senior Wang and the others have never done this before. They don't know that the black medicine has to be wrapped up before it can be used." Xu Yuli immediately defended Wang Di. He was afraid that Youhuang's words would make Wang Di go crazy.

"Haven't you done experiments?" You Huang asked Wang Di directly.

"Just like you said, just spread it out..."

"What's the point of spreading the black medicine? Just move dozens or hundreds of bags of flour into the ancient tomb and spread some fire, and it will explode."

You Huang was speechless, and Xue Zun immediately comforted her: "If there is no oil paper, we can go buy some. Don't be angry, because anger can hurt your liver. I'll go buy some with you."

"You've lived for hundreds of years but still don't understand life. You don't even have common sense." You Huang was in a good mood to begin with, but after all the trouble he had to deal with, he couldn't help but get angry.

"Hey, you little girl..."

Wang Di is a man of high moral character and the younger generations have always been respectful to him, so how could this little girl despise him?

Xu Yuli immediately stopped her and said, "Senior Wang, she's just a kid, don't bother with her. I'll ask Xue Zun to teach her a lesson later."

When Xu Sibai saw this, he quickly chimed in, "Senior Wang, don't bother with her. She's just a spoiled child. She'll definitely suffer in the future when she arrives in the world of immortal cultivation."

Xue Zun was afraid that You Huang would retort, so he immediately took her away to buy some oil paper.

The two came to a nearby city. Xue Zun cast a spell to make them look like people from Yinghuo country, and asked the locals where they could buy oil paper.

As it turned out, the other person didn't know what oil paper was at all. Xue Zun couldn't help but ask, "Are you sure there is such a thing as oil paper? You didn't come up with it yourself, did you?"

"How is that possible? Umbrellas are made of oiled paper. As long as there are umbrellas, there will be oiled paper..." At this point, You Huang seemed to have thought of something and grabbed a passing lady and asked, "Sister, where can I buy umbrella-making paper nearby?"

"I'm not sure what paper is used to make umbrellas, but..." The elder sister thought for a moment and said, "There's an umbrella shop up ahead. Why don't you go over and ask them?"

"Thank you, sis."

After hearing this, Youhuang hurriedly thanked him.

He secretly blamed himself for being stupid. The paper used to make umbrellas needs to be brushed with tung oil. Only umbrella makers know this, so how could others know the inside story?

When Youhuang thought of this, he grabbed Xue Zun's sleeve and dragged him in the direction his elder sister pointed. Sure enough, they soon saw an umbrella shop. After entering the shop, he asked the shopkeeper if he had any oil paper for sale.

"What are you buying oil paper for, girl?" It was the first time the boss met a girl who was not buying an umbrella but oil paper, so naturally he couldn't help asking a few more questions.

"Seeing that the snow is coming, I want to make some waterproof and moisture-proof lanterns." You Huang made up an excuse: "Silk is not very effective for windproofing, and ordinary paper is easily wetted by snow. The oil paper used to make umbrellas is both windproof and waterproof, and it is also transparent. I wonder if the shopkeeper can give us some."

"Young lady, you have a really good idea. Why didn't I think of using oil paper to make lanterns?" The shopkeeper was overjoyed to hear this.

"If you paint on the oil paper and decorate the bottom with longevity knots and tassels, the lantern will be more beautiful." Seeing that the boss had a business mind, Youhuang immediately made a new suggestion. If that didn't work, she could only contribute the making methods of revolving lanterns and sky lanterns.

"What a clever idea! The young lady is really kind-hearted." The shopkeeper discovered a new business opportunity and said generously after praising her: "I just made a batch of oil paper a few days ago, but it has not been used yet. Since the young lady is in a hurry to use it, I will give some to her. I hope she will not refuse it."

"Thank you very much, boss!"

Youhuang knew that the shopkeeper had made a lot of money, so he didn't refuse the oil paper he gave her.

Soon the shopkeeper ordered someone to bring out a large roll of oil paper. When Youhuang took it, he couldn't help but praise it before leaving.

After bringing the oil paper back, Youhuang asked someone to find some red clay and make it into something like dough. He then took out the oil paper and rolled it into a hollow paper tube.

After some operations, Youhuang finally made the first tube of explosives. After lighting it, he threw it hard towards the opposite hillside. With a loud bang, the first thermal weapon in the other world was born.

"It's done!"

The echoing sound was still in his ears and the smoke had not yet dissipated in front of him, but Wang Di still couldn't believe it.

He had spent decades painstakingly researching this thing, but it was made in just a few seconds by a little girl.

You Huang disagreed and said, "To be honest, in a relatively closed space like an ancient tomb, I can really get a few dozen bags of flour. There is no need to make black medicine so troublesome."

If it were her, she would definitely use mercuric fulminate or nitroglycerin, which are powerful in small doses.

Several people worked together and quickly made a large number of explosive tubes. They also added some small spells to dispel evil spirits in order to save the lives of those soldiers.

"Time is limited, and I can only do this much. When I have time in the future, I will expand upon it and increase its power to the point where I can at least destroy a city at a time."

Looking at his masterpiece, You Huang couldn't help but proudly express his idea: "The use of black medicine is not limited to the military field, it can also be widely used in civilian applications, such as making fireworks, firecrackers, etc., and can be used to increase the festive atmosphere during important festivals. I will make some for you to see later."

Xue Zun saw this and did not pour cold water on it. He said calmly: "I believe that with your ability, the production process of black medicine will continue to improve and perfect, including using different raw materials and methods to improve the quality and performance of black medicine."

"let's go."