Teyvat, the underground world, is not far from the roots of the World Tree, and is also close to the ruins of the underground kingdom of Khaenri'ah.
The war of extermination more than a hundred years ago led to the existence of many powerful monsters, mechanical monsters, and countless beast hounds here.
At this time, the ancient ruins of Khaenri'ah seemed to have ushered in some noise.
"130mm elemental howitzer, construction completed, fire!"
In front of the ruins, as soon as the girl's words fell, three huge cannons appeared beside her, constantly pouring firepower at the dozen or so tillers in the distance.
Countless shells drew a beautiful arc in the blood-red sky, like countless fire meteors, constantly bombarding the tillers that had not yet awakened.
"Boom! Boom! Boom!"
As the shells fell, the tillers that were in an unawakened state were blown to pieces in an instant, and even their cores were not left.
The treasure chests guarded by the tillers were also unsealed because of the lack of the tillers' protection.
Seeing this, Lin Yudie immediately ran to the treasure chest, opened it very skillfully, took out the things inside, and stuffed a note inside, which read:
"Sorry, I took this treasure chest before, you don't have it anymore, remember to hurry up next time, otherwise it will be taken away again~"
Looking at Lin Yudie's actions, Void Archives on the side was powerless to complain, after all, she had seen this kind of unscrupulous behavior too many times.
I don't know what Aunt Rukkhadevata would think if she saw that her silly and innocent daughter actually had such a side.
Thinking of this, Void Archives began to hesitate whether to tell the Greater Lord Rukkhadevata about Lin Yudie's unscrupulous behavior...
"Haha, it seems that the howitzer constructed by this goddess is really powerful. It's worth it that I have been studying all kinds of knowledge all this time. This goddess is amazing!"
Looking at her own results, Lin Yudie nodded with great satisfaction, and she naturally didn't know what Void Archives was thinking.
Since getting the permission from her mother, Lin Yudie has not been as playful as before.
After all, if she doesn't study a lot, her power of analysis and construction will not be able to play any power.
All day long, she is either learning the fighting skills of other demon gods in the world tree, or reading the various scientific and technological materials saved by Void Archives, or learning all kinds of knowledge beside her mother.
If she is tired of studying, or if she doesn't want to study one day, Lin Yudie will connect to the Akasha system through the World Tree, and then go to play with her lovely sister as Miss White Fairy.
Or maybe they come to the ruins of Khaenri'ah to fight various monsters and practice their fighting skills.
After all, the monsters in Khaenri'ah are so ferocious due to the influence of the abyss that they are not comparable to those in Teyvat.
And there are so many of them. There are often hundreds of tillers and beast hounds, that is, Rifthounds, besieging together.
There are even giant tillers and organized abyss mages, which can be said to be extremely dangerous.
And this is indeed a good place for Lin Yudie to hone her fighting skills. She often suppresses her strength below the demon level to fight the monsters here.
Although such days are monotonous, Lin Yudie feels that as long as she is with her mother and visits her lovely sister from time to time, she is already very satisfied.
As long as she has enough strength in the future, she can rescue her mother, so that the family can be reunited. Lin Yudie counted the treasure chest and thought happily.
Today, she planned to practice her power of analysis and construction. After all, she had learned so much knowledge, so she couldn't not use it, right?
The world of Teyvat also had its own laws, and Lin Yudie combined the knowledge taught by the Greater Lord Rukkhadevata with the scientific and technological information brought by Void Archives.
In the end, relying on her power of analysis and construction, she worked out some technologies suitable for the world of Teyvat, which Lin Yudie called elemental energy technology.
However, since her current strength is still very limited, she can only construct weapons such as artillery, tanks, and machine guns at most.
She has no way to construct those more advanced and more destructive mechas, supersonic fighters, etc.
"Don't be stunned, the missiles of the tiller over there are coming, you idiot, you are distracted during the battle!"
The anxious voice of Void Archives came to her ears, directly pulling Lin Yudie's thoughts back to reality.
Although the artillery attack just now blew up some of the tilling machines that were still sleeping, the huge noise caused naturally alarmed the wandering tilling machines in the distance.
At this time, one small missile after another attacked Lin Yudie.
"Two 7-barrel 30mm close-in defense guns, the construction is complete, start intercepting missiles!"
At this time, behind the girl, the two close-in defense guns had locked onto the incoming missiles, and bullets were continuously sprayed from the tiny muzzles, blowing up the incoming missiles in mid-air.
At this time, the missiles of those tilling machines were exploding one after another, as gorgeous as blooming fireworks, decorating this blood-red sky with some fleeting colors.
"Humph, these hateful tilling machines, they actually have no martial ethics and sneak attack cute girls, I'll blow you up!"
Then, he controlled his howitzer and blew all the tilling machines into parts.
Ah, finally destroyed, I really don't know how many of these things Khaenri'ah made back then, ah, no, that's... Rifthounds?"
Just when Lin Yudie was about to sit down and take a rest, countless black, wolf-like monsters suddenly came from all directions. These were the Rifthounds that she hated the most when playing games in her previous life.
However, at this time, she looked at those Rifthounds, and a hint of excitement flashed in her eyes, "Hey, Rifthounds? There are almost a hundred of them, not bad, let me see how I deal with you!"
"White grass purification!"
A layer of light green dendro element shield appeared on Lin Yudie's body.
This shield was specially designed by her after she saw the Jade Shield of the Geo Archon Morax.
Although the strength of the shield cannot be compared with Morax's Jade Shield, the dendro element symbolizes life and hope, which happens to be the nemesis of the Rifthounds's erosion characteristics.
Therefore, this shield can be well immune to the erosion characteristics of the Rifthounds, and will not cause the loss of vitality when fighting with them.
"Hehe, I haven't encountered so many Rifthounds before. It seems that I can have some fun today!"
Then, a light green long sword appeared in Lin Yudie's hand, and at the same time, she used her divine power to cut the Rifthounds in the distance.
This long sword was made by her after running all over Khaenri'ah and collecting countless materials. It is called "Skylight".
After all, the Void Archives cannot be used casually in Teyvat. Lin Yudie is now in need of a weapon that can be used to fight the enemy.