The mutant ghoul is trapped in a nitrogen-filled laboratory, living a life of eating, drinking, and being beaten every day, and there are constantly pieces of meat sent to its mouth, which can be eaten with just one mouth, and it seems to like this kind of life, and even the direction of evolution has begun to deviate this way.

Its mouth has become incredibly wide, and a single mouth can swallow an entire ghoul, and its teeth have deteriorated because it has evolved a super stomach that can be quickly digested no matter how much it eats.

Its forelimbs also degenerated, and its sharp toenails disappeared, replaced by two thick supporting legs, which could support its mouth to reach the food as quickly as possible, while its hind limbs never grew, and finally even degenerated, and it lay on the ground.

These are all evolved by itself, but some organs have evolved passively, such as the fluid glands on its carapace, which accelerates the secretion of gelatin, and because of the oxygen-free environment, the gum does not solidify, all of it flows to the ground, as long as it is scooped up, and there is no need to collect it manually.

A few days later, Luo Qiu collected a large vat of gum.

"Come on, come on, line up, front of the line with badly worn feet. Luo Qiu shouted loudly, and at the same time used his soul to guide the low-level skeletons, so that they could understand what it meant that the feet were severely worn.

Among the billions of skeletons, the most serious wear and tear is the soles of the feet and joints, almost every skeleton has joint strain, palms and soles of the hands and other frequently used parts, is a layer of grinding, the more low-level skeletons, the more frequent the activity, the more serious the wear.

In the past, the skeletons with steel bones were very homely, they could lie down and never sit, and they could sleep without waking up, but after Luo Qiu started to do things, the skeletons' activity increased greatly, and the wear and tear became more and more serious.

Luo Qiu was so anxious to get the carapace paint just to reduce wear and tear, and now that it was produced, he couldn't wait to use it on the skeletons immediately.

The colloidal paint was divided into a dozen sealed containers, and Gray and the other Lich Kings and Undead Sages each had a bottle in their hands, and the skeletons lined up in front of them obediently raised their feet, exposing the soles of their feet.

The condition of the soles of the feet of most skeletons is not optimistic, many have ground cartilage, and the loss of toes abounds.

Apply a thick layer to the soles of the feet, heels, phalanges and other areas that are easy to wear, and apply a thin layer to the grooves that are not easy to grind, and dare not apply more. After painting, let the skeletons hold their feet up and let them dry for three to five minutes before putting them down.

Although it is already very economical, the output of paint is a drop in the bucket, and even two million skeletons cannot be satisfied, let alone one billion skeletons in the interior of Steel Bone Ridge.

......

Time passed day by day, during which a heavy rain washed away the powder mist of the northern city and the swamps outside the city, and the ghouls outside the city were also cleared, and the communication between the mill iron city and the northern town was restored.

Humanity's luck was better, the corpse tide did not spread northward, and all the ghouls did not cross the swamp before they were all stopped by Luo Qi, preventing a catastrophe that could spread to the entire continent.

Ghouls who are not tempted do not wander too far on their own initiative, and after killing the living creatures outside the city, they temporarily stop their activities, because the more intense the activity, the faster they will starve.

If at this time, a living creature escapes the swamp and provokes a wave of corpses, and that living creature is lucky enough to escape far enough, it may take the tide to a populated area and spread it.

Luckily, nothing so bad happened, but it also raised another problem. The news of the Demon Iron City was cut off, and no one knew what was going on, and they all speculated whether it was the King of Steel Bones who broke the city and killed all the people.

The southern principality hastened to mobilize troops and ask for help from all countries on the mainland, this is a major event involving the rise and fall of the entire continent, and no one dares to ignore it, but the mobilization ability of mankind, to mobilize tens of millions of troops, first of all, it is necessary to mobilize a large amount of food, clothing, weapons and equipment, chariots, horses, beasts, and so on, which cannot be mobilized in a moment and a half.

However, it has been more than a month since Luo Qiu besieged the city, and the countries on the mainland have more or less received the information and have made certain preparations, and they should be able to mobilize more than two million troops within two months.

If Luo Qiu knew this speed, he probably couldn't help but look at them, because with the increase, now there are more than 10 million skeletons outside the Iron Grinding City, and Luo Qiu is still constantly sending troops here, and in two months, the human race will not face two million skeletons, but twenty or thirty million.

The reason why so many skeletons were transferred was mainly to experiment with the density of the soil, and Luo Qiu was going to use the skeletons to stuff the grinding iron city.

After stuffing in five million skeletons, the grinding iron city did reach the density of the earth, and every night, the breath of death would condense into fine particles like dust, slowly settling, and in the morning, a thin layer of ash on the ground would accumulate over time, and soon form a thick layer.

The soil also soaked into the masonry of the house, causing the skeletons to live comfortably in the house.

Half a month has passed, and the Iron City has transformed into a veritable immortal city.

In Blonn, the capital of the Southern Duchy, representatives of various countries and the high-ranking officials of the Duchy quarreled, and the focus of the quarrel was mainly on some information sent back by Hopless through secret channels a few days ago.

Many people couldn't believe what Hopeless's letter said.

"Two million skeletons are attacking the city? Now it has been reinforced to about 10 million? Will be reinforced by 20 million in the future? What are you kidding, are skeletons weeds? Tens of millions can be cut at will, this information is not credible. A nobleman from the Principality of Montenegro with a shy belly patted the table and said.

"Yes, yes, it's not credible, it's not a weed, it's tens of millions at every turn, I suspect that the number of skeletons surrounding the Iron Grinding City also has moisture. Quite a few people agreed. These people are accustomed to judging by common sense, and it is difficult for them to believe such information that is beyond common sense when they have not seen it with their own eyes.

But for many people who have top-secret information, the credibility of this information is very high.

Alexon, the head of the principality's magician group, stood up and said: "If you don't know anything about the facts, don't stand up and show off your ignorance, if I tell you that there is information that there were as many as one billion undead skeletons in the heyday of the Steel Bone Collar, then do you think that twenty or thirty million troops are difficult for them?"