Moreover, the difficulty of this world will become more disadvantageous and difficult as time passes, and this is the rule of the limited world challenge.

It may allow you plenty of time to prepare, but its difficulties will grow stronger over time until the challenger is destroyed, or the challenger is destroyed.

Perhaps since Zhao Mu and the others entered this world, this kind of thing has been changing, but it was not obvious in the early stage, and now when Zhao Mu and the others finally developed to a certain power, the strength of the monster is getting stronger and stronger.

"We can't delay it, it seems that we have to deal with that golden-skinned ancestor monster, if we don't kill it, there will be more and more silver-skinned ancestor monsters, and we will have to finish playing sooner or later."

Before and after, carefully calculated, Zhao Mu and the three of them have been in this limited challenge world for nearly four years, according to the current situation, the strength of the monster has increased and changed, and it is estimated that it will be delayed until the fifth year, and it will play the whole world.

From a certain aspect, the difficulty of the current post-apocalyptic limited challenge world is obviously higher than that of the Three Kingdoms limited world, you must know that the Three Kingdoms limited world, Zhao Mu and others have been in it for more than ten years.

And now, it has only been about four years, and the monster's strength has improved and changed, which means that if Zhao Mu challenges the next limited world, the time and space that can be given are estimated to be shorter, and the time limit is shorter, which is naturally full of urgency and difficulty.

It can be seen that the next limited world challenge is definitely very, very difficult, even with the strength of Zhao Mu and other super powers, it is estimated that it is extremely difficult to challenge and pass the level.

Of course, this is basically known and recognized, otherwise, the second-level powerhouses would not have such difficulty in getting a piece of magic shaft fragment.

Therefore, this aggravated Zhao Mu and Helian Light Mist even more. We must grasp this determination to challenge the world, just because if we can't seize the opportunity in this way, then next time, no one will be sure.

In fact, the difficulty of the current world has changed more drastically than they imagined, just as Zhao Mu was awakened from the retreat.

The army of alien monsters finally broke out in the largest counteroffensive in prehistory.

"Oh no, master, let's go to the greenstone forest west of Nanguang City. A large number of alien monsters are already gathering, and according to the investigation, their movements are speculated, and their target seems to be our Nanguang City. ”

"And...... Hundreds of miles away, in the base camp of our Beitian base, there are also many alien skin monsters around us who have begun to assemble, and these monsters are already crazy. ”

The information brought by the Dark Night Intelligence Department directly became a black cloud pressing above everyone's heads, and everyone's heart was full of heaviness.

These apocalyptic alien monsters are currently the first time in history that they have attacked human cities on such a large scale.

It wasn't like there were no monsters gathering before. They often attack human settlements, survivors, and so on, but their actions are far from being unified this time.

According to the news that has been obtained, at present, the whole land. The monsters that could be dispatched, they were all dispatched, and they launched a violent attack on the human survivors of the entire land at the same time.

Obviously, he has the power to call all the Alien Monsters to action. There is only one zài, and that is the ancestor of the alien skin monster.

After Zhao Mu got the news, he had nothing to say. Although one bad news after another struck, it was only then that he smelled the opportunity that the moment of crisis showed.

Perhaps, with the crisis of the monster general attack this time, the current situation in this world will be completely changed.

"You guys will immediately enter the first-level war defense alert, and I will personally investigate the changes in the strength of these monsters."

Zhao Mu quickly made a decision, he always felt that these alien races suddenly had such a big change in attitude, something must have changed, he didn't personally go deep into the enemy formation to take a walk, he always had a lingering uneasiness in his heart.

Of course, in addition to this feeling, Zhao Mu is also the most calm one of all the city lords of the human survivors, after all, he really doesn't have much problem if he wants to keep Nanguang City.

Moreover, there is not much territory he has beaten down, and in addition to one Nanguang City, there is only one Beitian base.

Between the two, there are even underground tunnels that have long been involved in each other, and both troop and material transportation can quickly support each other.

Zhao Mu didn't hesitate any longer, and hurriedly dropped this sentence, but his whole person soared into the sky, and quickly walked away in the astonishment of all his subordinates. 、

In fact, without missile-level power, the monster's personal threat to Zhao Mu was not as great as that of human society.

The greenstone forest in the west of the city occupies a large area, hundreds of thousands of square kilometers, even if it is placed on the earth, its area is almost the tenth largest forest on the earth, the Karnataka forest in India, in the current dream world, can also be regarded as the second largest forest area.

This greenstone forest usually hides a lot of alien monsters, and in addition to the major abandoned human cities that are occupied, it is the second place with the second largest number of alien skin monsters.

In the past, the military of the Nanguang settlement actually cleaned up the monsters in the neighboring big forest, and even in order to solve this threat once and for all, it had dispatched many bombers to bomb the whole land.

However, this forest seems to have an invisible magic, no matter how hot the incendiary bomb is dropped, but in the end it is not destroyed, but not long after the war, the plants of the greenstone forest grow rapidly again.

After such many attempts to no avail, the military of Nanguang City at that time gave up, and could only passively increase the height and thickness of the walls of the entire settlement, and add more defenses.

Zhao Mu did not summon six meteors to accelerate his flight, but even so, with his Divine Light-level wing equipment, his flight speed was still close to seven hundred kilometers per hour.

In less than half an hour, he had already gone deep into the depths of the forest, just as he had already noticed that there was a certain type of ground below, gathering more and more terrifying alien monsters, and Zhao Mu wanted to descend to investigate.

The unexpected happened.

I saw that under the forest, a group of red-skinned monsters suddenly came out, and their number became more and more, from dozens at the beginning to hundreds or thousands at the end.

A bare-skinned monster that can fly!

It turned out that the alien monsters at this time had finally evolved, no, or had hatched flying alien skin monsters, and on the backs of these red-skinned monsters, there were a pair of red flesh wings, just like the wings of a pterodactyl, and they all rushed towards Zhao Mu's side. (To be continued.) )