As soon as the door opened, Chen Xi and Fei Kun rushed into the door left and right. Dr. Skyhouse was right, there were indeed two guards standing on the left and four on the right in the large research room.

In this short moment, the red flames on Chen Xi's arms were swirling, and two fire dragons instantly flew out of his palms, directly rushing towards the two guards on the left, and completely devouring the two guards on the spot.

The fat man over there had already opened the six silver holes in the mecha when he pounced, and he opened his ultimate skill "Electromagnetic Storm" at the four guards on the right! ”

Chen Xi is gambling on this, according to the introduction of the skill of the electromagnetic storm, the skill has a strong invasion effect on mechatronics and virus mutants, and when the blue tyrant in the first level mutates the zombie virus, he was disturbed by the electromagnetic storm to the point of genetic collapse.

And the body of the black dragon soldier has been mechanically modified, Chen Xi is betting that the "electromagnetic storm" is also the nemesis of the electronic equipment in the black dragon soldier's body, otherwise the four black dragon soldiers will not be able to destroy it at the first time.

Luckily, they got the bet right! The four black dragon soldiers suddenly froze in place in the invisible electromagnetic storm, and then trembled violently, and blood even oozed from everyone's eyes.

Taking advantage of this opportunity, Chen Xi jumped up, punched and kicked, slammed his palms and shoulders, and immediately killed the four black dragon soldiers.

At this time, Chen Xi and Fei Kun could not take care to look into the prison, only to see that the two side by side rooms were still fenced with orange laser columns, and in one cell stood a sloppy old man with a mustache, and a black kitten lying on his shoulder. In the other cell, there was a beautiful girl with long light cyan hair, waiting to look at Chen Xi and Fei Kun with big round eyes, with a look of surprise on her face.

"Dr. Brive, known as the greatest scientist of the last days of mankind, has studied physics, space science, biology, machine engineering and other fields."

"Dr. Boomer, the daughter of Dr. Briv, is young but extremely gifted."

Chen Xi used the detection skill and easily obtained the information of the two hostages, and immediately felt a sense of collapse, this video game city system is too copycat, and it will die if it is a little original!

The fat man almost flew up, swiped the ID card twice, and released the father and daughter, these two were his life.

"Warriors, thank you so much for saving our father and daughter, and I will definitely give you a rich reward!" Dr. Brive stepped forward, his expression still unwavering. Boomer followed behind her father and did not speak, but looked at them with a smile.

"Ding, congratulations to the gamer for successfully rescuing Dr. Briv and getting a gacha reward; Successfully rescue Dr. Boommar and get a gacha reward. ”

The system prompt sound like a natural sound suddenly sounded in the minds of Chen Xi and Fei Kun, and the two of them looked at each other excitedly, and now they had three cards in their hands!

Just as Dr. Skyhouse walked in from the outside room, the three top scientists had just gathered when the small screen on the wall flashed Captain Liberty's head.

"Dear three doctors, I am a member of the underground resistance and Captain Freedom, and it is my teammates Kung Fu and Mecha who have rescued you. Now ask the three doctors to retreat according to the route I have indicated, my comrades are already on their way to meet you, and they will be there soon. ”

As soon as Captain Liberty finished speaking, a secret door appeared in the corner of the research room, and the three doctors glanced at each other, and Bumarer suddenly pointed at Chen Xi and the fat man and said, "Don't they escort us together?" ”

"My two teammates still have a mission, and they still have to destroy the evil Black Dragon Doctor." Captain Liberty explained.

Hearing this, Bu Marer immediately walked up to Chen Xi, handed over a capsule-shaped thing, and then waved his small fist, puffed out his cheeks and said fiercely: "These weapons are given to you, you must help me repair the villain of Dr. Black Dragon." With that, he winked cutely at the two of them, and then followed the two doctors into the dark passage.

Chen Xi looked at the capsule in his hand, he really couldn't cry or laugh, he pressed it lightly at the moment, and then threw it out. I only heard a bang, a cloud of smoke filled the air, and five or six props suddenly appeared on the ground.

In addition to a Premium Ammo Booster Pack, a box of Golden Potions, and a box of Gene Boosters, there are three other special items that are very eye-catching.

"Rabbit Gun - Dr. Boommar's specially invented weapon that fires a special light that turns enemies into rabbits with a cooldown of one minute. (This weapon is only effective against enemies below the miniboss level, and the gun needs a special magnetic field under the Black Dragon Base to supply energy, so it is only valid in the Black Dragon Base C and D areas.) ）”

"Magic Gum Cannon (5/5) - Dr. Boommar invented a weapon that can shoot a huge gel to stick to the enemy, and the gel is extracted from ancient beasts, so it is extremely difficult to break free, and due to the limited raw materials, it can only be fired five times."

"Kamen Superman Transformation Watch - Dr. Boommar invented a prop, wearing this watch can instantly transform into a Kamen Superman shape, without any buff function, only to make the gamer's look cool (according to Dr. Boommar's vision)."

Seeing the third prop, Chen Xi and the fat man were petrified at the same time......

At that moment, the two of them packed up their things, followed the arrow instructions and killed them back from the same way, perhaps it was the rescue of the three postdocs that made the black dragon doctor angry, and groups of black dragon soldiers rushed up one after another. The two relied on the terrain in the base, fought and advanced, and killed the corpses all the way in the base. Thanks to the weapons, props and ammunition packs that Boomer added to the two before parting, otherwise the two would really not be able to stop this wave of fierce and fearless crowd tactics.

In particular, the rabbit gun shows its might, and a shot per minute turns many black dragon soldiers into bouncing white rabbits, and the magic gum cannon is all used on the black dragon captain and the biological mechanical velociraptor body, this magic gum is amazingly powerful, and it is a large mass that can entangle people alive when it is shot out, once it is sticky to it, even if it is the black dragon captain, it can't break free, and can only obediently wait to be killed.

Finally, after the last four Black Dragon Captains guarding Area D were annihilated, the magic gum cannon also ran out of ammunition and became an ornament.

The two of them came to the end of Section D, in front of a huge elevator, and the arrows indicated that the last E section of the two was deep underground, and the two of them got on the elevator, only to hear the roar of machinery, and the elevator roared downward.

It took a long time to descend, and with the high speed of the elevator, I am afraid that it is almost to the underground lava layer. The two of them only felt that it was getting hotter and hotter, and a heat wave full of sulfur soon filled the entire space.

Finally, the elevator stopped, the gate opened, the two walked down slowly, walked along the passage for dozens of steps, the front suddenly opened up, the scene in front of him shocked Chen Xi stunned, shocked that he couldn't speak for a while, although Fei Kun on the side was the second time to see this scene, but also amazed.

But I saw that there was a huge underground space that was thousands of meters high and endless, and the towering pillars supported the dome directly, playing a role in supporting this huge underground space. At the center of the space is a natural lava lake, a mixture of golden and blood-red lava lakes that flow slowly, emitting a faint roar, like a pond of hellish demons.

However, this huge underground space is not empty, and there are reactors, rows of factories, and assembly lines around the lava lake, which is actually a super giant factory built on the edge of the underground lava lake. At the beginning, the black dragon base I saw outside was completely small compared to here.

In the distance of space, there stood hundreds of giant steel tyrannosaurus dragons up to hundreds of meters high, these big guys were all black, like an ancient demon god neatly arranged, a pair of giant eyes flashing orange-red evil light, looking like rows of strange demon stars from a distance.

When the two of them were staring at this strange scene in a daze, a giant tyrannosaurus rex suddenly walked towards them in the distance, as if a small mountain was slowly moving towards them, and the ground trembled slightly with every step the dragon took out. Since this cargo is hundreds of meters tall, and each step is a distance of fifty or sixty meters, so twenty or thirty steps came to the front of the two.

When the dragon approached, the two of them saw clearly that the troll was not all steel, and about half of its body was also flesh and blood. Some parts Chen Xi suspected that they were only covered with a layer of iron armor on their muscles, and the real metal part was only about one-third. This explains why the ground is able to hold such a huge monster.

The giant tyrannosaurus stopped about 100 meters in front of the two, and then slowly lowered the hideous dragon head until its jaw was about to touch the ground.

Immediately after that, the dragon's celestial spirit lid slowly clicked, and a metal platform rose up, and an old man in black stood proudly on it.

This old man is dark-skinned, a dark-skinned person, tall, thin and straight, with a clear and elegant face, short silver-gray hair, two thick eyebrows, a pair of eagle eyes, a straight nose and a wide mouth, and an awe-inspiring bearing. He was wearing the uniform of the Black Dragon Army, but there was no epaulette collar logo on it, and he stood there casually, like a king's momentum, and with a strong scholarly elegance.

"Blake. Rooted - Dr. Black Dragon, one of Karp's Seven Giants, the supreme governor of the Black Dragon Base, and the head of the Biomechanical Final Evolution Faction, one of the three major factions of Karp Corporation. ”

Chen Xi used probing to get the information of the old black man in front of him, and sure enough, he was Dr. Black Dragon, and they were both doctors, and this Dr. Black Dragon's appearance was much stronger than the two doctors just now, no wonder one was one of the Big Seven, and the other two could only be prisoners. Chen Xi thought maliciously.

"Welcome, young people, welcome to my Black Dragon base and witness this great moment." Dr. Black Dragon stretched out his arms and said with a smile, "The Iron Armored Black Dragon King, the final biological mechanical weapon I designed, has finally succeeded, and it is this big guy under my feet." He said as he tapped his toe to the head of the Iron Tyrannosaurus.

"After dormant in this underground base for several years, using geothermal energy as an energy source, and gathering the painstaking talents of countless scientists, we have created this perfect crystallization of ancient dinosaur genes, Z virus evolution and biological mechanics, the ultimate biological weapon of mankind - the ironclad black dragon king!"

Dr. Black Dragon's speech became faster and faster, and his expression was faintly crazy in excitement, he stretched out his hand to the back and continued to say in a chanting-like tone: "Look, one iron-armored black dragon king is enough to raze a city, but what about hundreds? What about thousands? Soon...... My army of Black Dragons will come out of the earth and sweep through the earth like a tidal wave. So, this is an epoch-making moment, so let you come to witness this great moment and become the first sacrifice under the mouth of my ironclad black dragon king! Heheha......"

In the end, Dr. Black Dragon actually looked up to the sky and laughed wildly, and after laughing for a long time, he turned over and sat back on the operating instrument in the Tyrannosaurus's brain, and manipulated the Black Dragon King to stand up quickly. The battle is imminent.

"Fatty, how to deal with this big monster, didn't you hit here last time?"

"It's here, but the last time I hit here, I actually ran out of ammunition and food, plus residual blood, so I was basically trampled to death by the big black dragon in front of me." The fat man said embarrassedly.