Faced with this black bottomless cavern, everyone gasped.

Because the depth and breadth of the cavern is so terrifying, if mutants and mutants move underground, such a cavern would be enough to hold hundreds of millions of dark creatures.

Where is the long cave connection? Has an underground network been formed in the occupied areas? Are the creatures of darkness relying on these networks to get closer to Eurasia?

There is only one way to answer these questions, and that is to dive in!

"There's a message from Command that the Castle Black Legion is allowed to enter the cave." Lin Feng put one hand on his military headset and told the news from the headquarters to his brothers.

Li Yi looked in the direction where Su Boliang was, and sure enough, the Black Castle Legion had already begun to prepare to enter, and a military plane landed and distributed the supplies it carried to the Black Castle Legion, which was a single soldier turbine lifting system.

To put it simply, a turbine lift system is a turbine engine strapped to a soldier's body, which is driven by electricity and operated by a handle, allowing the fighters to fly into the air and become trapeze artists, while providing the necessary oxygen and lighting.

This device has a fatal flaw, although it can fly with soldiers, but the fighters who fly into the air will become clumsy targets and lose their combat effectiveness, so it is usually only used when patrolling alone.

All the Castle Darks had to do was organize death squads, use turbine devices to quickly land at the bottom of the cavern, and then search.

Under the organization of the regiment commander Su Boliang, a death squad of fifty people was soon formed, and in addition to the individual flying device, they also carried three days' rations in case of emergency, plus heavy power plants and combat equipment, everyone looked very bulky.

"Stay, be careful." Lin Feng swallowed a mouthful of foam and said in a deep voice.

Su Bo Liang Ha laughed and jumped into the cave without looking back, and then there was an intermittent roar of turbines below the cave.

Boom~

Fifty warriors from the Black Castle Legion continued to fall into the abyss with the Legion Commander, and they used the point brake method, allowing their bodies to do free landing movements, and the descent speed exceeded a certain range before they turned on the turbine device, reduced the speed, and then entered the fall again.

Each turbine has a lighting system on it, and watching the lights disappear into the darkness little by little, the warriors' hearts are a little heavy, and no one knows what will happen to them at the bottom of the abyss.

Lin Feng looked at his military watch and said in a deep voice, "It will take them an hour to reach the bottom of the cave, and now we can only wait for their news." ”

As soon as Lin Feng's words fell, the mountain suddenly trembled violently, just like the moment before the eruption of a volcano, the gravel began to roll down towards the cave, and from the ground, an extremely shocking roar was emitted.

Whew~~~

"What's going on!?"

"Calling Su Boliang! What the hell did they encounter!? ”

"Air Force returns! Did you scan the caves!? ”

The commanders of the various legions became nervous and ordered the soldiers to leave the vicinity of the cave and keep trying to contact Su Boliang and the air force!

The Raven Legion's communications crew shouted in a full-band broadcast: "Scanned for foreign objects!" A large number of foreign objects are pouring out of the cave at a rapid pace! That's a lot! ”

"Tell me clearly, how much is a lot!?" Lin Feng pulled out his titanium blade from behind his back and asked in a deep voice.

"Anyway, it's a lot! The scanning array is completely dead! Now it's all snowflakes on the radar! It's all snowflakes! The Raven Legion's communications soldier snapped.

Swish~

In an instant, the faces of the warriors sank.

The scanning array is all snowflakes, which can only mean one thing, that is, countless mutant beasts or mutants! There were so many of them that it interfered with the scan array!

"Ranger Legion! Prepare for defense! Lin Feng raised his arm and said in a loud voice.

Soon, the Ranger Legion was divided into three parts, the warriors next to each other, like three triangular blades aimed at the cave, and the other legions were similarly defensive.

The shock of the mountain became more and more intense, and everyone was extremely nervous! No one knows what he will face.

Thundered~

Finally, the black mutant beast rose into the sky, flickering its wings, revealing its white fangs.

These mutants resemble bats, but are two or three times larger than bats, with blood-red eyes and piranha-like teeth.

Flying Mutants!

It's a flying mutant beast!

Everyone was amazed!

There is no doubt that this is a discovery that will change the course of history, and the dark creatures have finally reached the point where they can fly after they have wisdom!

Perhaps because bats are mammals, although they look like birds, they are the first flying mutants that dark creatures evolved.

I can't imagine that if one day even the birds begin to darken and brutally kill humans from the air, where else can people escape!?

The military department didn't have any plans to overpay flying mutants, because before that, all dark creatures couldn't fly!

So when the Dark Bat appeared, it caused a great deal of passivity to the warriors.

More than 500 fighters of the two major air force regiments of the Sky Crow and the Fighting Falcon were surrounded by a large number of dark bats, like a colony of ants gnawing on food hundreds of times their size.

The radar system was completely ineffective due to the large number of mutants, and the fighter pilots had to rely on manual operation.

Swish~

A swarm of dark bats flew into the air with a bloody mass in their mouths, then threw it from a height of several hundred meters, landed on the ground, and smashed into a puddle of flesh.

It was still a soldier of the Legion of Castle Black, and the Dark Bat had bitten his throat and gathered the power of the crowd to bring him out of the depths of the cavern, still in the air.

Su Boliang and his brothers, I'm afraid that they have already ruined the poisonous hands of the dark bat at this moment!

There is chaos on the battlefield!

Neither the Raven Legion nor the Fighting Falcon Legion are equipped with weapons of mass destruction against this mutated bat, because dark creatures absorb energy to evolve, and most of the fighters in the Fallen Calendar are equipped with cold weapons such as catapult javelins.

This javelin is effective against large mutants, but it still requires a high-fire catapult weapon against this small dark bat.

Strangely, the Dark Bat seems to have spotted the Raven and Fighting Falcon Legions' military planes, and is indifferent to the ground forces, focusing on those planes that they can't bite at all.

Thundered~

Obstructed by too many dark bats, the two military planes collided and turned into fireworks in the air.

Although the brothers of the ground forces are anxious, they have nothing to do about it, after all, the fighters can't fly, and they can't fly into the air to help the brothers of the Air Force.

In order to prevent the worst from happening, Sauron ordered the two major air corps to start a rapid ascent towards the air, and then scatter, so that the land forces that remained on the ground fell into a situation without air support!

Boom Boom Boom Boom Boom Boom ~

The earth began to shake again, even more violently than the last time! The hearts of the warriors are all in their throats!

If the same number of flying mutant beasts came out, there was no doubt that it would be a catastrophe for several major special operations legions!

The sound of shaking was getting closer and closer, and even the stones on the top of the mountain began to beat rhythmically.

At this moment, the sound of the roaring of the Air Force brothers came from the military headphones.

"It's coming out! The radar system shows it's a big guy! ”