Extremely high hardness and a melting point of over 100 million degrees.
She was very familiar with this physical property. It took them several years to build the crystal city.
The processing equipment they used to build Crystal City was as big as a mountain, and it also adopted the technology of alien invaders.
It is unclear what happened to the device later. Perhaps it was destroyed. After all, it could threaten Crystal City.
As someone who had participated in the construction of Crystal City, she knew very well that human technology alone, even nuclear weapons, could not destroy Crystal City.
If it exploded at extremely close range, the most it could do was to shatter the scarlet crystal into pieces and scatter them everywhere, but to completely destroy it...
All I can say is that using only nuclear weapons is too difficult, almost impossible.
However, the weapons she brought from another time and space can make up for this shortcoming.
As long as their nuclear weapons can shatter these scarlet crystal blocks, the weapons she brought from another world will be able to clean up the mess.
"Let's wait here." Xu Ying pulled Xu Xin to the edge.
"Hmm." Coco nestled in Xu Xin's arms, looking towards a place not far from here.
The place where Coco was looking was also the edge of this hollow area, less than twenty meters away from the two of them.
There, there are three vine ball elevators.
At this time, they are all closed and completely wrapped by vines.
"If there are alien invaders coming in later, we will follow them in." Xu Ying whispered.
"Yingying, I have a question about your guess." Xu Xin whispered.
"Hmm? What's the problem?"
"If this concentrated scarlet crystal is so hard and strong, how can alien invaders use it as a source of life?"
According to the monster, this scarlet crystal is edible.
It’s so hard, how can I eat it?
"Just swallow it." Xu Ying pursed her lips. "Why do you think they cut these scarlet crystals into small pieces the size of a fingernail?"
"…So the alien invaders were able to digest small pieces of concentrated scarlet crystal?"
"This scarlet crystal itself is the 'food' of their species. The concentrated scarlet crystal is probably like... compressed biscuits?" Xu Ying guessed.
Compressed biscuits...
"The alien invader's 'stomach acid' is really powerful..."
"It's not that they are powerful. It's probably just that the small pieces of scarlet crystal the size of a fingernail are too small and contain too little energy. They have lost some of the properties of the large pieces of scarlet crystal." Xu Ying speculated.
"Does the Earth's white crystal also have this property?" Xu Xin asked.
"I'm not sure about that." Xu Ying shook her head. "We've never cut such small and fragmented white crystals before. This is just a guess."
Xu Ying's speculation is not without reason.
The fist-sized pieces of concentrated scarlet crystal they had obtained earlier could drive alien invaders crazy.
But the ones the size of a fingernail won’t.
"So, we have to... use the weapons you brought." Xu Xin's voice lowered slightly.
If that's really the case...
He looked at Xu Ying.
If this is true, Yingying only has a few hours left.
What do people usually do in the last few hours of their life?
Xu Ying's choice is...
"I'm just struggling a little longer..." Xu Ying bit her lip.
Her choice was to struggle a little longer.
During the few hours she spent in the red fog of the underground space, she kept thinking about this matter.
But because she was afraid of dangerous situations, she kept waiting below.
But the longer she waited, the more panicked she became.
There's a feeling... that life is slipping away bit by bit, meaninglessly.
Moreover, there has been no danger below during these few hours.
Finally, after seeing Zhao Xiaochuan complete his excavation, Xu Ying could no longer sit still.
She decided to give it one last try.
She really doesn't want to die yet.
Given her current unstable condition, if she uses weapons from another time and space, she will basically be wiped out from the world like her predecessors.
At least... I want to see the world after the alien invaders are driven away before I die.
This is also the wish that her brother, Xu Xin from another time and space, has placed on her.
So, she decided to sneak into the interior of the World Tree and look for the weapons hidden by the alien invaders.
If she could achieve the same effect as the weapon she brought from another time and space, then she wouldn't have been wiped out of the world.
Xu Xin finally decided to come with her.
He has the ability to identify and directly check some valuable materials, and he also has a little guy in his arms who inexplicably knows some key information.
If we need to find some key weapons, it will definitely be more efficient if he comes along.
but……
Xu Xin glanced at Xu Ying who was already sitting on the ground hugging her legs.
He didn't want to attack Xu Ying, but he thought that this world tree should contain the weapon she wanted.
Especially the residential area above.
It's probably strictly prohibited to carry weapons there.
How could it be possible to place some super powerful weapons?
Xu Xin looked around: "These weapons, aren't they enough?"
There were strange weapons and equipment parked all around, ready for action.
At the same time, there were tens of thousands of eyes blinking in all directions like waves.
Fortunately, Xu Xin and the others were not discovered.
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