"When you get back to the treehouse, I have something for you. It'll save you the trouble of having to walk all the way to the mines." However, Xu Xin didn't want to know how she discovered the saltpeter mine. He planned to give Li Wenxi a bottle of mutation potion and a mutant beast contract to increase her efficiency.

"Ah? A means of transportation? For me? Wow, you are so kind!" Li Wenxi's voice was full of surprise. This was her biggest trouble at the moment, and she didn't expect Xu Xin to be able to solve it for her.

"It's okay, it's okay. I'll explain it to you after I give you the things. Oh, by the way, do you have mutant beast meat?" Xu Xin asked.

"There are quite a lot, all green-grade meat. I have never dared to eat it for fear of problems. Do you want it? I can give it to you." It seemed that she was very pleased that Xu Xin helped her solve the transportation problem, so she gave the meat to Xu Xin without asking any reason.

"Keep it for yourself. Eating this meat regularly will improve your health and it's also very delicious."

"You ate it? The introduction seemed to say it was just edible meat, but it actually has such effects!"

"Yeah, after eating it, I feel like my strength has increased, although it's very weak."

"Oh, I see. You want to use saltpeter to preserve mutant beast meat, right? We've all just come out of the dungeon, and we have a lot of mutant beast meat. They don't have any way to preserve it, so we can just plunder it!" Li Wenxi was eager to try. "I'm almost there. I'll give you the saltpeter when I get back!"

After hanging up the phone, Xu Xin took out a mutant beast contract and went to the synthesis table downstairs to make a bottle of mutation potion. He planned to give these two to Li Wenxi in exchange for her saltpeter.

With their current strength, they can force a wild boar or bison to drink the mutation potion, and after it mutates, they can use the Mutant Beast Contract to contract it.

The Mutant Beast Contract was not a special mount contract, so it certainly wouldn't be like Xu Xin riding the Silver King, where he would remain as steady as a rock and not be thrown off even at the fastest speeds, but ordinary riding was still possible.

Even if she didn't ride it, hanging a few backpacks on it to haul goods was also very suitable. This method was very suitable for Li Wenxi. Otherwise, she would have to travel long distances and carry the goods herself, which was time-consuming and labor-intensive. You know, time is so precious nowadays. The labor cost was so high that Xu Xin felt embarrassed to bargain with her and asked her for it.

With saltpeter that can be used for cooling, Xu Xin plans to build several large refrigerators to store some mutant beast meat as reserve food.

Just like Li Wenxi said, he could go directly to the platform to buy some mutant beast meat. After all, there were more than 1,800 people returning from the dungeon. There was quite a lot of mutant meat on the market, and the price was very low, because everyone felt that they could not finish eating all the meat within three days.

Soon, Li Wenxi called Xu Xin via video.

The video call was connected, and Li Wenxi on the other end of the line seemed a little excited: "What do you want to give me? I have the saltpeter ready."

Xu Xin sent the properties of the mutation potion and the mutant beast contract to Li Wenxi.

"This... you can actually create mutant beasts!" Li Wenxi was surprised, especially when she saw the mutant beast contract. She immediately understood Xu Xin's intention and clapped her hands. "You want me to use the mutation potion to create a mutant beast myself and contract it?"

"That's right." Xu Xin nodded. "It's best to choose something like a cow or a pig that can carry weight. That will be of the greatest help to you."

"Hmm... If I have to choose one, it would be a cow. Riding a pig is too weird!" Li Wenxi imagined himself riding a pig and shook his head suddenly, as if to get rid of the image in his mind.

Xu Xin told her some precautions regarding contracts and potions, such as making sure the mutant beast was willing to submit before using the contract.

"I understand. Let's trade!" Li Wenxi directly initiated a trade with Xu Xin.

[The other party initiates a transaction with you, Mutant Beast Contract*1, Mutation Potion*1 in exchange for Saltpeter*2]

Blue grade saltpeter? !

Li Wenxi on the screen spoke up, fiddling with a crystal-like lump of saltpeter in her hand. "I just came back and did some appraisals. Among all this saltpeter, there are four blue-grade ones. I'll give you two. The description seems to say that blue-grade saltpeter has much better properties than green-grade."

Xu Xin immediately clicked to agree, and two palm-sized pieces of blue-grade saltpeter appeared in his hands.

[Saltpeter: High-grade saltpeter. When dissolved in water, it absorbs a tremendous amount of heat, making it incredibly effective! Just one piece is enough to make blue-grade explosives.]

Xu Xin's heart skipped a beat when he saw the word "dynamite" in the introduction. He wondered if it was actually possible to make explosives. Unfortunately, he didn't know how to make them.

However, the previous sentence about absorbing "huge" amounts of heat made his heart beat faster. Could it be that the cooling effect was extremely strong?

"Have you tried the function of blue-grade saltpeter?"

"Yeah, I just threw a piece of ice into the basin, and it instantly froze, and the temperature around it dropped several degrees!" Li Wenxi pointed to a basin of ice next to him and said, "My legs are still a little cold now."

So strong!

You know, making ice with normal saltpeter not only consumes a lot of energy, which is almost one to one, but also takes a long time, half an hour to freeze. But this blue-grade saltpeter block actually froze instantly, and even caused the surrounding temperature to drop!

Gu Chong

"Okay, I can't wait to sign the mutant beast contract. It has to be completed before tomorrow's event. I'm going to go out first. You study saltpeter. I'll copy your homework when I come back, hehe."

My dear, there is more to this chapter. Please click on the next page to continue reading. It will be even more exciting later!