"What is this...?" Xu Xin picked up the bottle of gray medicine.
[Special Tree House Root Potion (Purple): Pour this under the tree house to promote the growth of its roots. Each dose of this potion can expand the tree house's protection range by three kilometers.]
A purple potion! A potion that expands the treehouse's protection range!
Xu Xin's treehouse's current protection range is three kilometers in radius, but after using this potion, it will be expanded to six kilometers! This is not only doubled, but also doubled the protection radius, and the area is expanded fourfold!
In other words, after using this potion on his tree house, Xu Xin's range of exploration will quadruple its current size! And within this expanded range, there might be another resource area.
Good stuff, really good stuff, worthy of being called a golden treasure chest.
Xu Xin picked up the thin card again.
[Metal Product Auto-Unlock Contract (Purple): Unlocks all metal product recipes. After using this contract, all metal-related crafting recipes will be automatically unlocked once all types of raw materials are obtained.]
Following the tree house renovation contract, he obtained another contract, a contract regarding the formula of metal products!
With this contract, Xu Xin is finally no longer limited to making stone tools!
[Congratulations! You've opened three treasure chests: gold, silver, and bronze. You're the first survivor to find and open all three. Your reward will be distributed after this jungle exploration event ends.]
【Survivors, please continue to work hard, strengthen yourself, and strive to survive in this world. 】
The mysterious voice sounded again.
He is the first to get all the treasure chests.
The event hasn't ended yet, and I don't know if anyone else will find the golden treasure chest.
To be honest, if Coco hadn't said there was a treasure chest down there and insisted on pulling him down, with his cautious nature, it would have been impossible for him to get into this cave and dig out an underground passage.
The conditions for obtaining this golden treasure chest are really too harsh.
Xu Xin shook his head, not wanting to think about it, and looked at the contract in his hand and chose to use it.
Just like last time, the card representing the contract shattered in his hand and merged into Xu Xin's body. Xu Xin felt a surge of power flowing into every part of his body.
This time, he not only felt stronger, but even his mind felt clearer. Everything he had just experienced was quickly sorted out in his mind.
First of all, that giant carnivorous plant should be the monster guarding the entrance to this underground world.
This abrupt iron room underground has been buried underground for many years, just like the people in the room, but no one knows where the extremely foul-smelling red mist in the room comes from.
The person in the room was not from this world, but he brought tools and food from his original world here, which meant that the way he came to this world was different from that of the survivors like Xu Xin. But Xu Xin couldn't figure out how he got here.
The golden treasure chest of this mission is tied to the secret of the underground space. The golden treasure chest should have been placed in this location intentionally. Anyone who discovers the golden treasure chest will definitely see the secret of this underground world before finding the golden treasure chest.
Those who cannot find the location of the golden treasure chest naturally cannot discover the secret.
Who is that mysterious voice? And why has it brought them to this world? Could it be that it's so they can grow up and fight the monsters deep underground?
How did those monsters come about? The size difference between them and the creatures on the surface is too great.
He thought of the giant anaconda in the center of the lake and the giant crocodile at the bottom of the stream. These two extraordinary huge creatures must have come from underground, and the area below the lake was probably a thousand meters deep underground.
There is also this potion in the gold treasure chest.
Xu Xin looked at the bottle of gray medicine in his hand. The whole bottle was only about 300 milliliters, and its weight was about the same as a bottled beverage.
The function of the medicine is to promote the development of the roots of the tree house and expand the protection range of the tree house. Does this mean that it is the roots of the tree house that protect survivors like Xu Xin from being harmed by underground creatures?
A picture appeared in Xu Xin's mind.
During the two hours that the tree house grew, while the ground part of the tree house was growing, the roots of the tree house were also differentiating underground, extending in all directions, extending to three kilometers away.
The roots of the tree house are densely and intricately woven underground, blocking any monsters that want to come out of the ground. Once a monster appears, it will be sucked by the roots of the tree house and quickly turned into a dry and brittle specimen.
Therefore, when the roots of the tree house grow longer, the protection range of the tree house will also become larger accordingly.
Xu Xin thought this explanation made sense.
This also explains why the mysterious voice repeatedly emphasized that the tree house must not be abandoned, because the tree house is the most powerful weapon and the greatest guarantee against underground monsters.
After figuring it all out, Xu Xin felt a little relieved. According to what the mysterious voice had said before, the monsters underground would not attack them in the near future, at least. They only needed to focus on dealing with the beasts on the ground.
The tree house will protect them.
Xu Xin placed the golden treasure chest in his backpack. Although the golden treasure chest was made of gold and was very heavy, Xu Xin's strength had been amplified several times and he was no longer the same person. Combined with the backpack that reduced the weight to 20%, he had no problem carrying the treasure chest on his back.
He was actually looking forward to what would happen after he collected all three treasure chests and assembled the pattern.
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