Qin Feng was going to use the metal element to sense the vibration of the mutant rat king when it ran to discover the direction of its escape.

The metal element began to become active, forming an arrow-like pattern in Qin Feng's mind.

Qin Feng and Haha quickly chased after them according to the instructions.

Soon came to the dormitory area.

"Where the hell is the Mutant Rat King going?"

Qin Feng thought while chasing.

He now had a glimmer of anticipation in his heart, expecting the mutant rat king to take him and Haha to find another possible exit from the arsenal.

A few minutes later.

The metallic elemental indication disappeared after Qin Feng turned around the corner of the dormitory area.

What appeared in front of Qin Feng was a mountain of fruit dew, wet and dripping with water.

If you look closely, there is a hole at the edge of this mountain.

The entrance to the cave is about three meters high and two meters wide.

It was pitch black inside, and nothing could be seen.

You don't have to think about it to know that the mutant rat king must have gotten into this hole.

"Annoying!"

After scolding at the entrance of the cave, Qin Feng turned his head and walked back again.

There were no lights in the cave, and I had to go to the elevator to pick up a few air-dried logs to use as torches.

It took a lot of time to go back and forth.

When Qin Feng and Haha entered the cave, the mutant rat king had already disappeared.

The cave was also wet, and the ground was covered with a biting chill of water.

There are also various stalactites growing on the walls and ceilings around it, and the strange appearance looks a little scary.

Qin Feng communicated with the elements in the water on the ground, but did not get any news of the mutant Rat King.

The mutant rat king should be hiding somewhere and didn't move, so the water element and the element in the stone can't sense it.

And Qin Feng's ability to communicate with various elements is limited now, and he can't make more complex information understand.

"Haha, lead the way. ”

"Wang ......"

Haha screamed to express his dissatisfaction, but still walked in front of Qin Feng.

"Hey, it seems that you are not only cowardly, but also very cheap. ”

"Kick you with your foot, and you instantly understand what you're going to do. ”

"Talk to you well, and yell at me a few times every time. ”

"What do you mean?"

Qin Feng thought for a while.

Look at it again, haha, I directly accelerated my pace and walked forward, and my ass was thrown up.

I walked for about ten minutes.

Qin Feng suddenly covered his mouth and nose.

It stinks!

I don't know where the smell came from.

I almost didn't vomit Qin Feng.

This taste is not unfamiliar to Qin Feng.

Mutant rats have this smell on them.

It's just not as thick as this time, not to mention, it's not so smelly.

The smell is mixed with the smell of rotten flesh and feces.

"The front could be a nest of mutant mice. ”

Qin Feng guessed and quickened his pace.

After another twenty or thirty meters, the ground became dry.

Under the light of the fire, Qin Feng found that on the ground under his feet, except for some mutant mouse corpses that were decomposing, the most was a pile of things of about the same size, dry and thin.

Without guessing, Qin Feng knew that the thing on the ground must be rat droppings, no wonder the smell here was so touching.

"Wang ...... Woo ......"

At this moment, Haha yelled a few times at a corner and suddenly ran over.

Qin Feng hurriedly followed.

"Dead?"

Qin Feng, who followed the past, saw the mutant rat king lying next to a big stone at a glance.

Haha is fiddling with the head of the mutant rat king with his dog paws.

After at least a minute, the mutant rat king did not react.

Qin Feng knew that the mutant rat king was indeed dead, so he walked over and squatted aside, thinking about it.

Actually, it's not called thinking, it's really disgusting.

Qin Feng wanted to find the crystal nucleus on the mutant rat king now, but he didn't want to get it.

The mutant rat king's body was so disgusting, not to mention that it was full of blood, and the pus on his body were almost broken, and a lot of red and green mixed viscous liquid flowed out, exuding a smell worse than rat feces.

It's a pity that the dog haha doesn't know how to use a knife.

Otherwise, Qin Feng immediately threw the recurve knife to haha and let it do the work.

In the end, Qin Feng still picked up the recurve knife.

First the mutant rat was given seppuku, and then the head was ......

The mutant rat king's fur, which was as hard as metal, actually returned to normal after it hung up, and Qin Feng cut it with a recurve knife without any effort.

A toss.

Finally, Qin Feng found a green crystal from the pile of smelly flesh of the mutant rat king.

After going to the corner and vomiting for a while, Qin Feng endured his nausea, took the green crystal that was only the size of a walnut in his hand and looked at it carefully.

The crystal is transparent as a whole, like a crystal, and there is not a trace of mutant rat king's blood on it, and there is a faint fragrance.

"Ding!"

"Congratulations to the host for getting the first crystal nucleus. ”

The sound of the system sounded, and at the same time, a text appeared in front of Qin Feng's eyes.

【Mutant Beast Crystal Nucleus】

Green first-level crystal nucleus, special ability "Devouring", 71% of the remaining source power.

"Level 1 Source Force?"

Qin Feng was a little confused, and just wanted to ask the system, but the voice of the system sounded again.

"Ding!"

"The host can exchange crystal nuclei with the system. ”

"Is the host exchanged?"

"Uh......"

Qin Feng was a little surprised.

It's been so long since the system appeared, and this is the first time that I have offered to exchange something with myself.

And it seems that the system is still in a hurry.

"What do I get in exchange with you?"

Qin Feng stabilized his mentality and was ready to bargain with the system.

"Ding!"

"The host can exchange the crystal nucleus for planting points, and can also exchange it for equivalent items in the system mall. ”

"How many planting points can I redeem?"

"Ding!"

"71% of the Source Force Level 1 Green Mutant Beast Crystal Nucleus can be exchanged for 930 planting points. ”

After the system finished speaking, it seemed that he guessed that Qin Feng might still want to see what items could be exchanged, and the system mall panel popped up directly.

This time, there are more things in the system mall.

Qin Feng saw at a glance that there were a bunch of dense graphics, and there were many types.

After taking a closer look, Qin Feng found that except for a metal bow, everything else was daily necessities and food and drink.

[550ml Master-Cola], the exchange price is 350 planting points for a bottle, and this time you can exchange the crystal nucleus for 3 bottles.

[Master Zhang's instant noodles], the exchange price is 250 planting points for a bag, and this time you can exchange the crystal nucleus for 5 bags.

【Flying Dragon Spicy Strips】......

Wait, here's ......

【Big Lace 7-Day Safety Set】, exchange price......

"Just exchange that metal bow. ”

Qin Feng didn't want to look at those daily necessities anymore, and the more he looked at them, the more irritated he became.

What is this place doing with that safety suit!

The redemption ended quickly.

The green first-level crystal nucleus in Qin Feng's hand disappeared out of thin air.

And in his weapon backpack appeared the metal bow with a pitch-black body and no reflection at all.

The metal bow comes with nine reusable metal arrows.

The weapon backpack was originally filled with explosive chili peppers, but Qin Feng didn't put it back after taking it out and putting it in his clothes pocket that day, and now it's empty.

Qin Feng originally wanted to exchange planting points with the system at first.

But after looking at the equivalent things in the mall, it is estimated that even if you add your remaining planting points, you won't be able to exchange for any good things.

After thinking about it, it is better to exchange a weapon in hand to improve your combat effectiveness.

After exchanging things, Qin Feng inspected the terrain near the rat's nest and made an unexpected discovery.

A hole in a hole.

It's cold outside, and the temperature is cooler than anywhere else.

"Another exit?"

Qin Feng was a little excited in his heart, and slapped it hard haha.