The entire underground research institute covers a huge area, and there are more than ten floors in total. If a team with poor strength is defeated layer by layer, it can often fight for a whole day, and it may not necessarily be unlucky in the process.

However, with the heroic method of pulling monsters from the Dugufu team, in just ten minutes, the four of them had already arrived at the seventh or eighth floor underground......

If you don't count the overwhelming zombie army behind you, the progress of the dungeon is already more than halfway!

But the heroic Rafa also brings heroic troubles. Because from this floor, due to the large number of zombies following behind him, the floor space is limited, and it gradually shows a trend of not falling behind......

Why can't the tail be broken?

The situation is that each time the four people go down the floor, they will rotate 90 degrees clockwise, so as to stagger the torrent of monsters following behind each other, and by the way, lure away the zombies on the external platform. It's like ...... The four snakes run on one screen, and they have discussed their tactics with each other to avoid crashing into each other.

But...... As more and more zombies followed, the line became longer and longer, and the body of the snake continued to expand and lengthen, and gradually the research center was originally very spacious and a little not enough for them to run.

This is still the result of the zombies' different speeds, some are talented and fast, some have average speeds, and some lack arms and legs and can only move slowly behind.

If there is no one left behind, it will not be tolerated sooner!

Thankfully, it's not a snake that hangs up once you hit it, it's just like that.

With the flexible skills of four first-line masters, he can withstand the pressure of zombies. In addition, the zombies passing by often do not hate themselves, and forcibly pass through each other's teams...... However, in the process, it is normal to be torn, bitten, pulled, hit and affected. It can be said that every crossing means an adventure.

Think about it, it's like being on a bustling street, you have to rush from one side of the crowd to the other side, and all people are your enemies. will give you a few hits when you get close...... Do you feel creepy?

But no matter how terrifying it is, you have to hold on! To get a good result, you have to take such a risk!

The four of them went all the way down like this, in the case of the tail not falling off. I had no choice but to slowly rotate 90° to 180°, then 270°, then 360°...... So much so to deal with it.

When we reached the last two floors, the situation became worse and worse.

They pulled the surging procession around on the same platform. Crowded. It's almost impossible to tell where the exit entrance is.

At the same time, layer by layer, I really encountered a few zombie captain-level mini-bosses, or zombie mutants with special skills, mixed in the zombie bush, and jumped out from time to time to cause them some trouble......

Among the four, Dugu Fu has the lowest strength, so he is also the most passive. It's already very hurtful to withstand the pursuit of ordinary zombies. Coupled with the interference of the zombie captain, he was narrowly missed by the zombies several times. Drowned in the tide of immortality.

Fortunately, he still has a life-saving prop, teleporting, healing, and invincible at a critical moment...... Use it when you can.

The Dark Strength level can cancel out the virus infection under the captain, and the ability is restored. The small injuries that continue to accumulate in the body are a little troublesome when there is a mess on the platform, and when they enter the descent channel, the zombies can't keep up for a while, so they can take the opportunity to recover some, plus the awakened NPC has some privileges, barely supporting.

Almost as passive as him is Li Twelve.

For what? Because Dugu Fu, Feather Fang, and Xiangying are all awakened NPCs, their interface display is no different from that of players. When surrounded by groups, it is easy to identify the direction and find the right path through the map that comes with the system interface.

And Li Twelve, he didn't wake up, he couldn't do it.

But it's okay, he has the Grim Reaper phone. The Reaper phone, which was originally intended for players, has introduced the map navigation function provided by the system. Although it is not as convenient as the direct field of vision, it can still be used.

In addition, Li Twelve, a natural battle maniac, the more dangerous he is, the more he can explode his potential, and the grandmaster-level combat power is indeed strong, killing all the way down, it is still a little easier than Dugu Fu!

Both of them survived, not to mention the obviously reserved Feather Fang and Xiangying......

==========

It's here!

After a full half an hour of running, the four of them stepped on the ground at the lowest level of the base in almost no particular order. I breathed a sigh of relief in my heart.

Half an hour! From the ground to the hundreds of meters underground, along the rugged corridor, you have to be on guard against the attack of the zombies behind you at any time, and you have to explore the unknown terrain ahead, you can't run the wrong way, you can't hit the wall, and you can't miss too many zombies. Later, the team grew, and they had to guard against strange attacks that could come from all directions......

The tension and fatigue along the way are not much different from when I was alone and entangled with immortal plot characters in a second-level dangerous house.

All of them were sweating profusely, and their hearts were beating violently. But...... This is not the end, this is the beginning of the last part!

Those who travel a hundred miles are half ninety, this is the most important part, and it is also the most critical!

The four people who came down from the passage in four directions did not delay for almost a second, quickly observed the map, and according to Dugufu's order, ran with the zombies on the lowest level and drew a gourd in the same way.

The Underground Research Institute is a dungeon, and the terrain is not fixed. It's just the number of floors, the pattern of the elevator going down layer by layer, and the general structure is the same, the microscopic structure, the secret room, the distribution of monsters, and so on are not fixed.

It was better on the road just now. This bottom floor has the largest area and the most places, and even the central elevator shaft has become a solid ground that can be stepped on...... And this also includes the boss who will definitely have to face.

You have to plan well in order to attract as many monsters as possible and play more beautiful results!

However, this is not the point of clearing the level. And in ...... Guo Xingxing, the proprietress , Phantom Haisha and Xia Zhiban.

At the same time that Dugu Fu and the four of them said "arrived", these four girls also arrived at the lowest floor through the elevator, and their hearts were slightly nervous: It's here!

For the first time, they did not follow behind the butts of Dugu Fu and the four people, but chose to arrive at the same time as the four masters.

For what? Because they have to make some arrangements for the final clearance......

The lowest floor of the elevator shaft is a smooth floor. Stepping out of the glass-canned elevator, there was not a single monster roaming around. Even in the central area, where the zombies that have fallen to death are densely packed, the rich doomsday virus is drifting to its heart's content......

This is a perk that the system gives to players. From the elevator down to the last floor, there is such a blank area. Players can take a break and prepare for the last and toughest battle.

So the four girls began to prepare. From everyone's space bag, take out a light and thin but very tough iron grille, just like building blocks, quickly use this iron grille, the elevator is encircled, enclosed into a diameter of more than ten meters, up to three or four meters, open on all sides of the semi-open area.

If you have a good memory, you should remember that during the siege of Lingling, the system army used this kind of prop.

After building the skeleton, the four girls took out the suction cup guns that had been prepared for a long time, and began to circle around the iron grille, shooting the suction cups dragging the ropes one by one to the outer wall of the glass elevator, and soon the ceiling composed of twenty or thirty ropes began to take shape.

Then take out the canvas that is ready for the duck from the space bag, shake it open, take the pole that is also prepared for the duck in advance, and spread the canvas piece by piece on the ceiling.

Soon, a fussy appearance, in fact, is weak and can't help the wind, push hard will shake, push a few more times, the roof will fall off the yurt-like thing, it is considered to be built.

As rough as it was, so fragile, it was as if the girls had completed an incredible project. When the tent was erected, Qi Qi breathed a sigh of relief.

lined up, walked into the central column of the tent, and the elevator with a diameter of three or four meters, and then took out the walkie-talkie: "Ready!" (To be continued......)