The flying mutant creatures were the first to rush into Crystal City.
From a distance, these flying mutant creatures were all birds of prey with wingspans exceeding two meters, and some even reached four or five meters.
Fortunately, Xu Xin did not see any pterosaurs like the one he saw before among these flying mutant creatures.
It seems that there should be no advanced mutant creatures in this group of beasts.
At least not yet.
This is good news.
Because they are fully capable of stopping a herd of beasts of this level!
"Everyone, pay attention to the sky. Flying mutant creatures have entered Crystal City and will be approaching soon!" Xu Xin said in the group.
The situation on the ground is not optimistic either.
The beast tide that had originally surrounded the Crystal City had now completely poured into the Crystal City.
In the map in his mind, the Crystal City part has been completely covered by red dots!
Under the siege of such a huge group, the more than 200 survivors in Crystal City were already struggling to deal with the ground creatures, and they also had to face the fierce beasts that jumped up from time to time and tried to destroy the heavy crossbows.
It would be really difficult for them to divert their attention to attack the flying creatures in the sky.
"this… !"
"I may be able to take care of the sky!"
"I will use a heavy crossbow to attack the sky!"
Sure enough, they were also a little confused after seeing Xu Xin's words.
Xu Xin immediately said: "Prioritize attacking the ground beasts and clearing out the number of ground beasts! I want you to pay attention to the mutant creatures in the sky and don't let them cause damage to yourselves, the tree house and the heavy crossbow!"
"Understood!"
"I still have half my ammunition left! Enough to last a while longer!"
"You used it up too fast! I still have more than half left!"
"Save ammunition! Aim at densely populated areas and attack so that every round of ammunition can have the greatest effect!"
"I'm responsible for this street on the east side! Our bombing ranges must not overlap!"
"Then I can allocate one to attack the big bird in the sky!"
Without the explorers saying anything, these survivors spontaneously began to launch the most effective attacks and plans against the beasts!
After all, they are survivors who have lived to this day, and they are the best in Area 1 and Area 188. This group of people have long been old hands in the survival world.
There is no need for them to give instructions on what to do.
The speed of flying mutant creatures is much faster than that of ground mutant creatures, and far exceeds the speed of underground mutant creatures.
In just a dozen seconds, it had crossed half of the Crystal City and completely approached the World Tree.
However, when they flew into the Crystal City, a small part of them fell directly down.
They are the larger ones among this group of mutant creatures!
"They were affected by the Crystal City!" Xu Xin immediately thought of the principle behind it and reminded them in the Explorer, "These flying mutant creatures are not completely without the blood of giant beasts!"
It seems that the other party did not find enough flying mutant creatures without the blood of giant beasts, so they mixed a group of flying creatures with relatively thin blood of giant beasts into the group.
Perhaps they also wanted to try whether they would not be affected by the Crystal City at high altitudes, but unfortunately, according to Ah Fu's test, as long as they could see, they would be affected. The vision range of the birds of prey was far beyond that of mammals such as humans. Basically, once they entered the range of the Crystal City, they fell in large numbers.
Within seconds of entering the Crystal City, two out of ten of the entire flying corps were killed.
But the remaining swarms of flying mutant creatures were not affected at all. They came at a high speed, directly passed the heavy crossbow defense line of the two hundred survivors, and swooped towards the World Tree!
Their target is the trunk of the World Tree, not the crown.
The tree canopy is too lush and too vast, almost covering half of the Crystal City. It would be a huge project to completely destroy the tree canopy, not to mention that the tree canopy can repair itself, and the speed of destruction may not be as fast as the speed of repair.
The other party knew very well that only by destroying the trunk could the World Tree be destroyed, and attacking the crown was useless.
As a result, all the flying mutant creatures were not attracted by the tree canopy at all, but flew directly under the canopy of the World Tree and swooped down towards the trunk.
The speed is too fast!
At this moment, three fierce birds suddenly flew out from the window of Wen Guixin's tree house and flew rapidly towards the flying herd of beasts!
It was like three fighter planes took off from the ground and climbed up towards the group of enemy fighter planes that were diving in from the sky!
Moreover, their goal is very simple, just to crash into it!
If you can hurt the other party, you win!
The flying mutant creatures did not surround the World Tree like the ground mutant creatures. They flew collectively from the north of Crystal City. Their overall formation was like geese flying south, forming a standard V-shape.
This formation is designed to reduce overall flight resistance.
Usually the one leading the group is the strongest and also the most tired.
The three fierce birds that flew out from the window of Wen Guixin's tree house were aiming at the tip of the V-formation!
In an instant, three fierce birds crashed into the enemy's flying formation, and the overall formation of the flying mutant creatures was directly disrupted. Sharp bird calls rang out, and feathers flew everywhere!
Wen Guixin spoke up among the explorers: "What are you all standing there for? Blast them!"
As she spoke, the tree house crossbow on her tree house began to work, and in an instant it fired dozens of explosive crossbow shells into the air!
At the same time, explosive crossbows also scattered from several other tree houses!
There is no point in using heavy crossbows or super heavy crossbows to deal with aerial targets. Explosive crossbows are the most suitable!
But the mutant bird is very agile in the air, and it is not easy to hit it.
Most of the explosive crossbows were avoided by the mutant birds in the air and fell into the group of mutant creatures on the ground.
And under the coverage of the exploding crossbows in the sky, a small part of them still directly hit the mutant birds in the air!
“BOOM BOOM BOOM BOOM BOOM BOOM!”
The double explosions on the ground and in the air instantly made the area around the World Tree extremely bright with fire!
For a moment, it seemed as if fireworks were being set off under the World Tree, accompanied by feathers all over the sky, which was even quite beautiful.
The mutated birds affected by the aerial explosion fell from the air in large numbers.
But there was still some that were not affected. They completely ignored everything else and rushed towards the World Tree at an extremely fast speed!
Then it swept across the trunk of the World Tree, and its sharp claws scraped across the trunk of the World Tree like a sharp knife!
“Shhh!”
Such voices continued to ring in Xu Xin's ears!
Every fierce bird left a mark on the trunk of the World Tree that was several meters long and half a foot deep!
For a moment, the trunk of the World Tree was riddled with holes!
Fortunately, the diameter of the entire trunk is ten meters, and even the half-foot deep mark did not penetrate the bark of the World Tree.
However, the birds of prey that had flown over the trunk of the World Tree, causing considerable damage to it, drew a circle in the air, turned around and swooped down towards the trunk of the World Tree again!
“Shhh!”
“Shhh!”
In an instant, countless birds of prey appeared around the trunk of the World Tree, flying back and forth madly like flies around rotten fruit. Every flight would cause scratches of several meters on the trunk of the World Tree!
Moreover, they actually began to attack one location in a very disciplined manner.
In just a few seconds, the area that was being attacked was scratched more than a dozen times, forming a gully that was four or five meters long, more than ten centimeters wide, and at least one foot deep!
If this continues, even if the World Tree is thick-skinned and tough, it will not be able to withstand it!
The explorers around the World Tree began to hesitate when pointing to the control panel.
This group of mutated birds are too close to the trunk of the World Tree. If they were to shoot over, the damage to the World Tree would probably be even greater!
It's like hurting the enemy by a thousand and hurting your own eighteen thousand!
Fortunately, before they could think of a better way, the plant heart showed its power in a flash.
Under the influence of the World Tree, the height that the vines controlled by the plant heart can attack has increased several times!
The original plant heart vine was at most a dozen meters long, but now, it was piercing straight up to a height of twenty or thirty meters!
Countless vines sprouted from the ground, like a bamboo forest rising from the ground, directly piercing most of the flying birds in the air!
In addition, the vines are extremely flexible. As they shuttled through the air and pierced through the air, the number of mutated birds was instantly reduced by nearly half again.
In this crisis, the remaining birds of prey no longer focused on attacking the trunk of the tree house, but screamed and climbed upwards rapidly!
Originally they chose to attack from a position nearly thirty meters above the ground, but now, in order to avoid the attack of plant vines, they had to fly to a higher area.
However, they still did not choose to stop attacking and escape, but instead changed an area, aiming at the trunk of the World Tree at a height of about 70 meters, and began to attack frantically again!
But this time, the vines controlled by the plant heart were out of reach.
Each of them stretched straight upward like a bamboo, but their length reached its limit at fifty meters.
The vines controlled by the plant hearts swayed in the air for a few times, and finally had to shrink back down in despair.
"Come on!"
In the tree house nearby, Wen Guixin put her hands on the windowsill, stuck her head out, and shouted loudly into the air.
Immediately, the infected birds around gathered quickly and rushed towards the group of uninfected guys!
In just a few dozen seconds, the three fierce birds released by Wen Guixin earlier have infected most of the mutant creatures that came this time!
This group of infected birds of prey climbed up and rushed directly towards the group of birds of prey that were frantically attacking the World Tree at a height of 70 meters!
Their numbers already outnumber the enemy!
The final result is obvious.
This group of fierce birds was completely wiped out.
Either they were killed by the explosive crossbow, or pierced to death by the plant heart, or they were directly infected by Wen Guixin's ability and controlled and could only wait to die.
The battle on the ground was also showing signs of coming to an end.
The balance of victory has begun to tilt towards them.
There were not many mutant creatures on the main ground that could cross the ravine, and these guys could hardly fight against the vines that were frantically growing out of the ground. Almost no one could reach the trunk of the World Tree.
Even if it reaches that point, after one or two attacks on the tree trunk, it will be pierced by several vines and then sucked dry, becoming nutrients for the plant's heart.
The main enemies that the beasts at the back have to face are their own people who have rebelled after being infected by Wen Guixin's abilities.
The "internal strife" within the herd made the scene extremely bloody and chaotic.
In the tree houses surrounding the World Tree, most of the people had already used up their ammunition and were watching the farce near their tree houses.
The newcomers were a little confused.
"What's going on? Why are these guys fighting each other?"
"Why are there so many defectors? And it seems... there are more defectors than non-defectors?"
"Haha, you don't understand this, right? This is the ability of our sister Gui Xin!"
"When I saw the enemy's beast group attacking this time, I felt that this defense would be completely stress-free!"
"That's right. With Sister Gui Xin here, the beasts are basically here to deliver food!"
Everyone in the Crystal City survivor group was discussing this.
Because they have all stopped what they are doing, even the ammunition and the remaining survivors have stopped.
The current situation no longer requires them to attack.
Xu Xin looked at the ground outside the window and once again marveled at Wen Guixin's abilities.
Too strong.
It’s really powerful.
Although I already knew the power of her abilities on the beasts, I still couldn't help but marvel when I saw it again.
This time, if Wen Guixin didn’t have the ability to back them up, they might not be able to protect the World Tree at all.
The swarms of mutated creatures on the ground and in the air alone are enough to destroy the World Tree!
At this moment, his watch vibrated again. It was Qin Fu calling.
"Boss, the guys digging holes underground are now less than 500 meters away from the World Tree. But they are now a little slower and their movements are much quieter. It seems that they don't want people on the ground to find them."
This is really a desire to sneak into the house, and yet he wants to lower his voice.
The sound was indeed small enough that, in the chaos on the ground, even with Xu Xin's enhanced hearing, he was completely unaware of the unusual movement beneath the ground.
If we really don't know what they are doing, and if they secretly dig under the World Tree and take away or destroy the core of the tree house...
This group of people might be suddenly hit by failure just when they were celebrating their victory.
That's really ironic.
Fortunately, with Qin Fu's observation ability, they could see everything going on below the ground.
"How many meters above the ground are they?"
"Five meters, just like before, not far from the ground, coming from all directions, a total of... 23 channels were dug out, and in each channel, there were two creatures the size of tigers and leopards."
That is to say, there are forty-six in total.
This number is not large, but it is not a small number underground.
Fortunately, at a depth of five meters, they can all be dug out directly from the ravine, so that the explorers can attack the ravine directly and kill them.
Their plan to steal the house is now meaningless.
At this moment, Ji Chaoyang suddenly said something in the Explorer Channel.
"East of Crystal City! Behemoth!"
What?!
Xu Xin turned his head and looked towards the east.
That’s where his tree house originally was.
Then, his Tong Kong suddenly shrank.
I saw a huge dinosaur in the east, running towards the Crystal City!
… Dinosaur?!