At the beginning, I traveled through the wilderness, and I controlled the beasts to survive.

"Falcon?" Lu Xiuning suddenly became interested when he heard the word bird.

"Well, there are obviously no trees over there, and it doesn't look like a place where they live, but they attack us. It's too much!" Zhao Jingjing said with an angry expression on her face when she talked about the group of falcons.

"Some creatures regard the surrounding areas as their own territory, and it is normal to attack creatures that stray into them. Let's go over and take a look." Lu Xiuning waved his hand and motioned for everyone to speed up.

After 2 kilometers, the density of the woods gradually decreases.

Ahead, a gray-white exposed mountain appeared.

Birdsong gradually came from all around.

The color of the ground that everyone stepped on and the rocks also turned gray.

"Natural saltpeter should be white or off-white." Teacher Zheng squatted on the ground, knocked off a small piece of gravel with a tool, then took out the alcohol lamp wrapped in layers from his backpack and lit it with a lighter.

This alcohol lamp was naturally collected from the laboratory.

Phew~

The alcohol lamp raised a bright yellow flame.

Teacher Zheng picked up a piece of off-white stone with tweezers, put it on an alcohol lamp to bake, and explained: "If it is saltpeter, purple smoke will rise after burning. This is the simplest identification method."

"In ancient times, when the technology for making nitrate was immature, we relied on pouring a lime mixture on human and animal excrement and collecting the precipitated potassium nitrate crystals. This yield was too low. Even in the academy, we did not advocate the use of this method. , it’s better to spare some time to cultivate the soul beast.”

"In addition to saltpeter, making explosives also requires charcoal and sulfur. This is just the ancient method of making black powder."

"Black powder was gradually phased out in the 19th century, replaced by detonators and TNT, which are the explosive raw materials for modern guns, rockets, and missiles."

“In modern times, Western scientists have invented stronger explosives such as mercury fulminate, nitrocellulose, cotton powder, nitroglycerin, tnt, yellow gunpowder, smokeless gunpowder, etc., but these involve complex chemical reactions. We We can only start step by step.”

When Teacher Zheng was explaining to everyone, the gray-white stone in his hand gradually emitted blue-purple smoke.

She nodded, put the stones on the ground and crushed them, and said, "It is indeed saltpeter. The next step is to consider how to mine them and transport them back to the academy."

Nowadays, everyone has explored the southeast and northwest directions of the college, and only the mountain range to the east has discovered the existence of saltpeter.

Hearing this, Lu Xiuning said without hesitation: "If you want to mine the saltpeter here, or even the ores from other areas, you must study the insect man's method of cultivating insects, and use a large number of insects to transport saltpeter and various materials. "

"Otherwise, relying solely on us humans and soul beasts will be too inefficient."

"It turns out that Teacher Lu, you have been prepared for a long time. Is all this part of your plan? Lu jojo!" Lin Tianhe's pupils were shocked.

"Ahem, don't do those awkward things. This is a plan we discussed together with Dean Wu." Lu Xiuning glanced at him speechlessly.

While he was talking, there was a burst of sharp birdsong from the direction of the exit of the forest.

Then, there was the sound of flapping wings all around.

Falcons with brass-colored wings all over their bodies, sharp beaks, and sharp eyes, only 50 centimeters long but with a wingspan of 1.5 meters, flew out of the woods on both sides, flying in mid-air toward Han. Ning and others made sharp screams.

"Ling~"

When the tree spirits and tree demons guarding everyone saw this, they protected the nine people in the middle, and their bodies lit up with bright green light.

"Bah!!!"

The birds were indistinguishable, their wings flapped violently, and a wisp of turbid white light quickly flew between their wings.

Whoosh! !

White blades of light that looked like sharp arrows shot out from between the wings of the birds, covering the humans and spirit beasts below indiscriminately.

"Ling!"

Yin Yi let out a light scold, and the green light all over her body surged, and she threw out vines towards the birds in front of her.

Hoo ho ho!

Suddenly, the surrounding thick trees and the green grass on the ground began to grow wildly, turning into vines as thick as buckets, forming a curtain wall, blocking everyone.

The light blade of the storm hit the vine curtain wall, splashing large spots of light, which quickly dissipated in the air.

The next second, densely packed small vines grew from the thick green and black vines, shooting out at the speed of light.

Although the flock of birds moved very fast, there were still some relatively weak falcons that accidentally got entangled in the vines and were tied tightly, letting out a whimpering sound.

"Teacher Lu, how about it? As you requested, I caught a group of the smallest falcons that look like baby birds."

Han Ning signaled Yinyi to tie a few palm-sized birds with vines and put them in front of everyone.

"It feels weird to keep calling them falcons. Let's give them a name. Let's call them copper-feathered flying falcons. Well, they should be falcons. The shape of their wings is very sharp and has the characteristics of a falcon." Lu Xiuning observed the bird. said.

"Chirp! Chirp!!" The copper-feathered flying falcon was imprisoned in the vines by Silver Ripples, and was still struggling, making bursts of rapid bird calls.

"My temper is quite explosive." Han Ning was a little irritated by the chirping of birds.

White light flowed from the copper-feathered flying falcon hovering outside the vine curtain wall, hitting the wall like crazy.

But it was all to no avail. The vines generated by the silver ripples were like a natural chasm, firmly blocking them out.

After a pause, Lu Xiuning continued: "If you take the initiative to attack us, you must teach them a lesson. Keep walking around to see if you can find some eggs and bring them directly."

"Teacher Lu, you are so cruel!" Lin Tianhe bared his teeth.

"We don't have to massacre soul beasts on a large scale, but in order to survive, we have to use some small tricks. I am not a holy mother, nor a moral saint. Everything is based on the interests of us humans." Lu Xiuning shrugged and observed After looking at the surrounding environment and thinking thoughtfully,

"I remember that falcon nests are usually built on the edge of cliffs. There should be a cliff or cliff nearby. Do you know where it is, Jingjingzu?"

Zhao Jingjing thought for a moment and said, "Maybe in front? I remember Teacher Li said that if a large exposed rock wall suddenly appears, then there is likely to be a cliff ahead. Let's continue walking forward and take a look?"

"Okay, the spirit beasts here are not very strong. With our ability, we can still go a little further." Lu Xiuning nodded and motioned for everyone to continue moving forward.

Yinyi controlled the vines and formed a ring of eggshell-shaped vine walls around everyone, covering everyone's progress in an absolutely defensive posture.

At this moment, there was still an endless stream of birds joining in, constantly attacking the vines of Silver Ripples.

There are even some copper-feathered flying falcons that directly hit the hard vines with their bodies and pecked off the beaks directly.