"Squeak! ~~~”

The nature of the animal, the seriously injured mutant mouse no longer fights with Bai Cen, and while repelling Bai Cen, he turns around and is about to run away, but, it may be due to the fact that he is not very adaptable to the lack of an eye just now, and he is obviously running away in the direction of the gate, but he actually deviated from the track while running, and suddenly hit the edge of the gate.

"Damn, you can't even understand how to run away, then don't run, return my knife!"

Originally, even if the mutant rat was injured, but if he wanted to escape, Bai Cen still couldn't catch up with him, after all, if the rat drilled into the pipe, Bai Cen had no choice. But it was such a coincidence, and the mutant mouse with only one eye left walked in an arc, which undoubtedly gave Bai Cen a chance, catching up with the mutant mouse in three steps and two steps, and pulling out the Tang knife.

"Squeak! ~~~”

The moment he pulled out the Tang knife, it undoubtedly brought a lot of damage to the mutant rat again, and his tail pulled towards Bai Cen again.

Bai Cen had already taken precautions, and as soon as his legs were forced, his body had jumped into the air, and he easily dodged the tail attack at a distance of two meters, and at the same time, Bai Cen used the power of falling in the air to aim at the head of the mutant mouse, and stabbed the mutant mouse through with a knife.

After struggling a few times, the mutant rat finally kicked its legs and left this world completely.

"Congratulations on completing the hidden mission, killing the first mutant creature, getting 10 attribute points, 100 energy points, getting a random ingredient, and getting a primary strengthening stone."

While killing the mutant rats, Bai Cen's ears also sounded the unique prompt sound of the ingredient supplier, although it was still dry and without a trace of emotion, but it made Bai Cen feel particularly wonderful.

"Isn't this day's harvest a little too rich?"

The prompt sound of the ingredient supplier made Bai Cen himself feel a little frightened, as the saying goes, there must be demons when things happen, this day's harvest is so rich that Bai Cen can't believe it, not only obtained the most energy points in history, but also completed a hidden task, which really made Bai Cen feel a little afraid.

But think about it, it's better to say something when burning zombies, after all, there is the help of Molotov cocktails. But in the battle just now, it almost cost Bai Cen's life, and it was natural to have a little gain.

"Whatever, the last days have come, what else do I have to fear, master? It doesn't matter, it's always a good thing to have more strength, put away what I deserve first. ”

"Redeem."

I have to say that after the end of the world came, Bai Cen can be said to have undergone earth-shaking changes, he who didn't even dare to offend a little hooligan before, has a super psychological quality in just a few days.

Of course, the reason for all this is because of strength, compared to the previous scholar who was powerless, now Bai Cen already has the capital to stand at the top of the world, and the continuous battle has also allowed him to slowly adapt to the new environment of the end times.

"Congratulations on your successful exchange and 2 power points."

The voice of the ingredient supplier sounded, and the corpse of the original mutant mouse disappeared in an instant, leaving only a crystal nucleus, but these did not attract too much attention from Bai Cen, but it was the prompt sound of the ingredient supplier, which made Bai Cen stunned.

"The mutant rat can actually exchange two energy points, why is that? Could it be that this mutant rat is already a second-level post-apocalyptic creature? ”

In the past, when Bai Cen exchanged the corpses of zombies, he only had a little energy point, but this time he had two points, and the first thing Bai Cen thought of was that this mutant rat had become a second-level apocalyptic creature.

Of course, Bai Cen would not know about this kind of problem, so Bai Cen decided to ask an expert.

"Dear master, if it is a second-level creature, you are now a bone scum, and if it is a second-level apocalyptic creature, how can the energy points exchanged be only two points, just that mutant mouse, at most, it is a first-level and second-grade creature, compared to a second-level creature, it is far worse."

This expert is undoubtedly Xiao You, but when Bai Cen asked if the mutant mouse was a second-level creature, Xiao You almost fainted without laughing.

"First-class and second-grade creatures? How many other first-class organisms are there? How many grades of first-level creatures are there? ”

When Xiao You finished explaining, Bai Cen was instantly messy,

But think about it, if you can become a second-grade creature with the strength of a mutant mouse, then it's too sorry for the level of the ingredient supplier.

"Of course you have to divide it, not only first-level creatures, even if it is a seventh-level creature, it is also divided into levels, after all, even if it is a seventh-level creature, there is also a difference between strength and weakness, just like the master, now you have the strength of the first and second grades, but even if your strength is doubled, you are still a first-level creature, but your strength has barely improved from the second grade to the third grade, it's that simple."

"As for the grades that each grade is divided into, like the grade, the grade is also divided into seven grades."

Xiaoyou's explanation is very simple, and the examples are also very vivid, but the protagonist of the example makes Bai Cen a little crying without tears.

"Okay, I see, there's another question, just now when I completed the hidden mission, I got a primary enhancement stone, what is the use of this thing?"

In the hidden mission that has just been completed, Bai Cen only knows nothing about this primary strengthening stone among all the rewards, and he doesn't know what to do with it.

"Primary strengthening stones, that's a good thing, strengthening stones are used to strengthen equipment, and the equipment strengthened by strengthening stones will have an attribute attached, and there is a chance to increase a level, that is to say, if you use strengthening stones to strengthen the Tang knife in your hand now, then your Tang knife may evolve from the current level 0 item to a first-level item, and then add an attribute."

Xiaoyou is worthy of being an expert, and any problem is not a problem in her opinion.

"There is actually such a good thing, then I can get more strengthening stones in the future, can't I make the Tang Knife into a seventh-level item?"

After knowing the function of the strengthening stone, Bai Cen was overjoyed, such a good thing is simply a treasure.