Ten days passed by, and in these ten days, Yagan and others finally broke through their limits with the continuous supply of materials from the federal government. Among them, the ones who improved their strength the most were Yagan and Luo Zheng. Although they were both level 4, with sufficient crystal diamonds and materials, they broke through the fifth level barrier with others in one fell swoop and became real level 6 powerhouses.

Until now, the advantages of the mercenaries in the God and Demon Training Field were completely revealed. When they were at the low and middle levels, the mercenaries could improve their strength at a miraculous speed as long as they had sufficient crystal diamonds. However, the only regret was that it also cost unimaginable prices to break through to the sixth level in a short period of time. Not only did they consume a total of five million crystal diamond reserves and a large amount of materials in the Federation, but they also squandered all the five million crystal diamonds obtained in the underground battle and a group of props worth three million. To be honest, if these crystal diamonds and props were used rationally, it would not be impossible for Yagan and others to even upgrade to the seventh level. However, now that time is limited, they can only use this method of squeezing and promoting growth to forcibly improve their strength.

Huge efforts equals huge gains, which is the eternal truth in the training ground of gods and demons. The entire 13 million crystal diamonds were exchanged for the leap-up improvement of Zhou Feng’s team. Zeng Yike, Murong Yu and Zeng Rou not only upgraded their strength to the sixth level, but also strengthened their bloodline to the Golden Titan bloodline, high-level shadow elf bloodline and natural druid bloodline respectively. After the promotion, Zeng Yike’s power was greatly improved, but the lightning blessing special effects were also urgently for the Thunder Thunder Special Effects. Any enemy who attacked Zeng Yike or was attacked by Zeng Yike would be attacked by thunder. The strength of the thunder attack was related to Zeng Yike’s power, and there was a certain chance to attach a paralysis effect to the enemy.

After Murong Yu's bloodline was upgraded to the high-level shadow elf bloodline, there was also a huge qualitative change. First, her passive special effect of Shadow Invisibility became an active special effect of Trace and Hidden. Once used, she can enter the stealth state under any circumstances. What's more important is that the priority of this stealth state is extremely high, and even some detective magic props or skills cannot be detected. Moreover, Hidden can also increase Murong Yu's movement speed and attack speed by 50% in stealth state, making her a real deadly killer.

Zeng Rou's natural druid bloodline is slightly different. While improving Zeng Rou's old abilities, it also gives Zeng Rou a transformation special effect, allowing her to transform into three forms: cheetah form, eagle form and giant bear form. Among them, the cheetah form can have invisible ability, while the eagle form can make Zeng Rou have the ability to fly. As for the giant bear form, it enhances Zeng Rou's strength and defense. With these three forms of body protection, Zeng Rou's survival ability on the battlefield is undoubtedly greatly improved.

As for the sense of ah, the bloodlines of the three of them, Lu Yu Rou and Luo Zheng, have not changed much, because the bloodlines of the three of them cannot be upgraded to the bloodline. If they want to change their bloodlines, they need to reset their bloodlines, so it is impossible and there is no need to improve their bloodlines for the time being. And the remaining Rania finally exchanged for pure blood potion, turning herself into a pure blood clan, thus obtaining a series of blood clan talents, which greatly improved her strength.

However, although their strength has been greatly improved, Yagan and others were not too excited. After all, most of the huge wealth that could have allowed them to reach the peak of the sixth level or even break through the seventh level was wasted by them. If they were to be, they would feel distressed and regretful. Moreover, this opportunity is hard to come by. They have exhausted the federal reserve supplies this time. If they want it, they can only have the idea of ​​reserving supplies in the federal war. However, even the bold Yagan and others couldn't help but put away this idea. You must know that crystal diamonds are also a very precious wealth for the Federation. In addition to improving the strength of soldiers, it is also an excellent energy. Even the proton generator supporting the defense systems of the three major bases is made of crystal diamonds as the energy body, so no matter what, this crystal diamond must not be moved.

Another news that made Yagan and others feel heavy was that the main force of the Zerg had gradually arrived at the city in the past ten days. The three human shelters, Flame, Ice and Thunder, have been completely blocked by a huge encirclement. At this moment, the three shelters are completely occupied by the Zerg, whether in the sky or under, or in the ground. As soon as the time comes, the Zerg will immediately launch a general attack and flock to it.

After learning that Yagan and others successfully broke through, Kurt Kings and others were surprised and immediately issued an order to them, ordering them to garrison the three fortresses of Thunder, Flame and Ice in groups. According to the rewards ahead, the remaining cloned soldiers can also prevent Zerg reinforcements from various places for about ten days, and the time on the road is only twenty days. This is the most critical twenty days. They must put pressure on the Zerg army as much as possible within these twenty days, so that they can continuously send the army to the three bases. The more Zergs sent from the mother nest, the more empty the strength of the mother nest will be, and the greater the success rate of their actions will be.

After receiving the order from Kurt Kings, Yagan and others were also divided into three groups, stationed in three shelters. Among them, Lanya, Zeng Yurou and Zeng Yike were stationed in the Flame Fortress, while Yagan and Murong Yu were stationed in the Ice Fortress. As for the Thunder Fortress, Zeng Rou and Luo Zheng led a group of mutant strong men to guard it. Because although the defense power of the Thunder Fortress is the strongest, the Zerg that besieged Thunder Fortress is several times that of the other two fortresses. It seems that the brainworm already knows the location of the human commander, so it will attack this city.

As time went by, the Zerg army finally launched a full-scale attack on the third day when Yagan and others broke through. The overwhelming Zerg suddenly rushed towards the three bases as if it was dark covering the sky and the land, and it was indescribably terrifying.

—————

The Ice Fortress is the strongest defense and weakest counterattack ability among the three major human bases. The ice defense system of the fortress can turn the area of ​​ten thousand meters of the fortress into a bitter and cold place. The closer it is to the city wall, the lower the temperature. When the enemy enters within a range of one thousand meters of the city wall, what awaits them is the absolute zero degree that can freeze all the steel into pieces - negative 273.15℃.

Moreover, the absolute zero degree of the ice fortress is different from the absolute zero degree in the general sense. The science and technology in the wasteland world have been developed to the point where technology can almost be used to create magic elements. This low temperature of -273.15℃ can not only freeze the opponent's body, but also has the "destroyed" magic special effect. Once completely frozen, the frozen object will soon be re-decomposed into the simplest cold air, and even the residue will not be left behind. The cold air transformed into the corpse will once again become the supporting energy for the ice defense system. This cycle is extremely difficult to break.

However, although the ice defense system of the Ice Fortress is powerful, it still cannot stop the hundreds of millions of Zerg army. Because even though the magic special effects of [Immortal] can turn those Zergs into ashes, their destruction speed cannot be compared with the Flame Fortress and Thunder Fortress in any case. Under the continuous and crazy impact of the Zergs, the Ice Fortress was soon surrounded by ice sculptures of different shapes. The other Zergs stepped on the ice sculptures transformed by their companions, and rushed towards the city walls of the Ice Fortress like a sea tide.

The first wave of rushing onto the wall was still velocity and flying insects. Although their speed had been greatly reduced under the erosion of the cold, their number was too large. Soon, countless Zergs climbed up to the wall and began to wave sharp minions at the cloned soldiers on the wall. However, what is even more troublesome is that the temperature on the wall has returned to normal, so once these insects rushed to the wall, they could quickly get rid of the slow effect of the cold, thus exerting terrible lethality.

"Damn bug..."

Looking at the Zergs that were rushing up to the city wall, a cold murderous intent flashed in his eyes. Although the strength of these velocity and flying insects was low, their number was too large. Although the Ice Fortress had fired a large number of incendiary bombs and high-explosion bombs, causing nearly tens of millions of terrible casualties to the Zerg. However, these tens of millions of Zerg corpses were quickly covered and swallowed by more Zergs, and then became the energy in the bodies of these Zergs, supporting them to resist the invasion of cold air, and thus rushing to the city wall at a faster speed.

Devour similar people and use similar corpses as energy to temporarily improve your defense against external attacks. This attribute is not terrible to other Zergs, but it has become the most terrifying talent ability to put on Zergs with a large number of velocity and flying insects. This is also the real terrifying thing about Zerg cannon fodder tactics. The more you kill, the stronger these bugs will be until you kill all the bugs, or you are destroyed by the bugs.

"Activate the secondary defense measures!"

Just as more and more Zergs rushed up to the city walls and endless ice sculptures surrounded the city walls, the feeling of having obtained command of the ice fortress also opened the intelligent brain controller given by Kurt Kings, and connected the intelligent brain to issue voice commands. As his words fell, an extremely sharp cold air suddenly shot out from around the city wall. At the same time, the originally vague cold air suddenly condensed and turned into a huge ice cap to cover the entire base area of ​​10,000 meters.

Although the ice defense system does not have any counterattack ability, it is not so easy to defeat it.

"Everyone quickly clears the Zerg around the base!"

Looking at the large number of Zergs separated by the ice cap around the fortress, a sarcastic smile appeared on their cold faces. Then, they raised the miniature electromagnetic pulse cannon in their hand to aim at the Zergs that were still hitting the city wall and pulled the trigger. As the spark of blue flames were shining, a large number of Zergs were torn into pieces by these tiny energy-forming bullets. The laser beams shot through one Zerg after another, and the Zergs that had lost their vitality could not resist the erosion of the cold air. In the blink of an eye, they were frozen into pieces and then destroyed.

The best way to deal with Zerg cannon fodder tactics is to completely destroy them and not even leave their bodies!

Boom boom boom boom boom boom boom!

However, just as Ya Yan and others were crazily clearing the Zerg in the ice cap, waves of violent roars suddenly sounded from the sky. Then there were countless bone spurs, slurry and venom bombarding the huge ice cap like a storm, blasting the ice cap one after another. At the same time, a large number of velocity insects, flying insects, and even melee Zergs such as golden beetles were also gnawing around the ice cap. Although they were soon frozen into ice sculptures by the absolute low temperature attached to the ice cap, there were still countless cracks of large and small under the crazy impact of the Zerg.

"What a crazy guy..."

Looking at the distance, the ranged Zergs that were constantly spraying poisonous stings, slurry and venom, and the velocity worms that were trying their best to dig out a piece of broken ice, the eyes of awesomeness became cold again.

The strongest ice bases are under such great pressure to defend themselves, and it is conceivable that the situation of the Flame Base and Thunder Base will not be much better.

Support for twenty days... This is not easy task.
Chapter completed!