"Whew!" A black and white beam of light shot out from the muzzle of the sniper gun, and the head of a Xuan-level skeleton 2,000 meters away was instantly pierced, and the residual momentum of the beam pierced through the cervical vertebrae of the skeleton immediately behind.

"Ding, kill the Xuan-level six-star skeleton and get two copies of the essence of the Xuan-level bone."

"Bunker, the power of the combination of light and dark elements can easily kill a Xuan-level six-star skeleton in seconds, this elemental expert is simply a necessary magic skill for home travel, killing people and goods." Sun Tu sighed sincerely.

Next, he experimented with several element combinations, the effect made him very satisfied, and luckily triggered an elemental critical hit, Sun Tu used the light and fire element at that time, the effect was comparable to that of a magic cannon, and all the skeletons within twenty meters were blown into the sky.

Promoted to the Xuan level, his combat effectiveness instantly increased by several grades, although it is not possible to kill monsters at the appointment level for the time being, but with the improvement of the skill level, Sun Tu's combat effectiveness still has a lot of room for improvement, I believe that it will not be long before it is not impossible to kill a ground-level skeleton.

But there is a very important thing that bothers him at the moment, and that is how to learn how to make firearms, and there are three awesome firearm drawings in his backpack that tempt him.

"Click!" The sniper rifle in his hand made two abnormal noises, and then directly muted fire, and it was obvious that the long firing made this sniper rifle that was already prone to malfunction go wrong again.

Sun Tu knew that the magic energy converter was broken before he could disassemble it, because the drawings given by the system had already marked the flaws in the design of this sniper rifle.

Although he knows what the problem is, Sun Tu will only fix it, not improve it, and maybe as the level increases, there may be skills related to improving this aspect.

Since he had long expected that there would be a problem with the firearm, how could Sun Tu not be prepared.

He quickly disassembled the firearm, removed the scorching magic energy converter, replaced it with a new one, maintained it again to restore its durability to full value, and reassembled the sniper rifle, which instantly became no different from the new factory.

"Ding, repair and maintain the Demon Hunter Sniper Rifle successfully, skill proficiency +20."

"Ding, the skill gun repair and maintenance skill level has been raised to LV3."

Two days before going to the front line, Sun Tu did not give up this skill, and whenever he had time, he went to the gun scrap warehouse, repaired a lot of rifles that were not very serious, and synthesized ten special magic energy converters for sniper rifles, which he also prepared in order to prevent problems with sniper rifles.

Of course, the administrator in charge of the armament depot also kept Sun Tubai busy, not only giving him 50,000 credits for labor expenses, but also issuing gun maintenance certificates.

Don't underestimate this document, relying on this certificate, Sun Tu can completely open a firearms repair shop anywhere in the Dragon Emperor City, and the heaviest one can also sell firearms openly.

Today may be Sun Tu's lucky day, the system's prompt sound did not stop here, and then a prompt tone made him overjoyed, making him feel sleepy and someone sent a pillow.

"Ding, due to the host's unremitting efforts to repair and maintain the firearm, it automatically comprehends the skill firearm improvement and firearm manufacturing."

"Ding, open the weapon workshop, the host can complete the manufacture or improve the firearm in the workshop, and the firearms made in the workshop have a chance to appear high-quality."

Gun Modification LV1 can improve the defects of Tier Yellow firearms, and slightly increase the stability and power of firearms.

Gun manufacturing LV1, which can be used to make Tier Yellow firearms.

"I really want to do something, it's just that the skill level is only one level, and now I can only make yellow-level bone thug pistols." Sun Tu said, and immediately went to check the materials needed to make the pistol.

Among the three materials, there is no shortage of yellow-level bone crystals and soul fires, and there is only one Xuan-level bone crystal, which is equivalent to ten parts of bone essence.

Now there are only two copies of the essence of Xuan-level bones in the backpack, and there are still eight copies left to make a thug pistol, and in the current situation of a hundred-fold explosion rate, I believe it will not be long before it can be manufactured.

Turning off the system interface, Sun Tu began to concentrate on hunting Xuan-level skeletons, his goal is more than eight Xuan-level bone essences, if you want to make a focused flamethrower and Butcher Gatling, you must raise the level of firearm manufacturing to lv2, now the upgrade function is restored, experience cannot be converted into skill proficiency, and the skill level can only be improved by constantly making firearms, which requires a lot of materials.

At 6:50 p.m., the sun slowly disappeared on the horizon after the day's work, and the sky gradually became dark, but the skeletons outside the city did not seem to have the intention of leaving work, but became more and more active, and the troops that did not appear during the day also appeared one after another.

There are skeleton mages with white bone staffs, skeleton archers with bone longbows and quivers, skeleton cavalry equipped with bone spears and bone armor, riding skeleton horses, skeleton shield warriors with shields and battle axes, and skeleton throwers holding various projectiles, and many huge giant skeleton monsters, the largest of which is twenty or thirty meters tall.

The zombie army that did not appear during the day also appeared, this is not the zombie wearing Qing Dynasty costumes and jumping in the ninth uncle's movie, but it is very similar to the zombies in Resident Evil, don't look at their bodies are highly rotten, but their defense is a grade higher than that of skeletons, and the speed is not slower than skeletons of the same level.

However, zombies have two weaknesses, the first is of course the head, the second is the heart, and the zombies also have a very obvious weakness, that is, they are afraid of flames, if there is a flame on the way forward, they will take the initiative to detour.

With the appearance of various monsters, the atmosphere on the city wall became more and more solemn, and the weapons hidden in the city wall were revealed, and the thick cannon muzzles stretched out from the bunker and aimed at the overwhelming monster group outside the city.

"Roar!" An eardrum-piercing roar soared into the sky, and a skeleton monster as high as a city wall appeared on the horizon, slowly heading towards the Dragon Emperor City with heavy steps.

"You recruits really have nothing to say about their luck, on the first day, a skeleton beast at the peak of the ground level appeared, this kind of monster can directly threaten the lives of our people, isn't the little guy a little weak now." A veteran quipped.

"How, how is it possible." The recruit swallowed his saliva with difficulty, and even stuttered a little when he spoke.

"Haha, your body is shaking, don't worry, this kind of big guy is the main target of heavy weapons, they have no chance to get close to the city wall at all, we have to be careful of those skeletons and zombies with long-range attacks." The veteran laughed and said, and at the same time he remembered the first time he saw such a behemoth, as if he was directly scared, of course he would not say this kind of trouble.