The stone he thrown traveled like a bullet of a pistol. And it hit at the rat's forehead squarely. Blood spurted and splattered around when the stone penetrated the skull of the knuckle-user rat. Only the trailing red light was remained visible for a half-second after Yeman fired the stone which enveloped by his glowing bright red.

The glowing bright red was the Finger Bullet skill. It hardened an object and increased its penetration force. Not only that, it also doubled his damage and whatever he threw would travel like a bullet. It affected his finger strength as well with the addition of his speed and strength stats.

He was wondering when he first tried using the skill because it was an unusual kind of skill. How could it be that his flick was able to fire like a pistol? He was puzzled and excited at the same time. That's why he tried using it at the monsters above. But after seeing the result of the skill, he became addicted.

He felt like he was firing a real pistol; however, his aim was a little bit off at 50 meters and higher distance. Even at 40-49 meter was no good as well. But at 30 and below he could aim at any part of the enemy in a spot-on accuracy. Yeman thought that maybe he needed more dexterity to increase his distance of accuracy.

Since he leveled up after killing the monsters. He decided to add points to his dexterity. He also added some points to his agility and vitality.

He was testing his skill and lost count of time while continuing to kill the monsters until no one had remained. Since he was still not satisfied, he decided to step down and entered the said sewer.

But he was surprised after entering because only the strange smell could resemble the sewer and anything aside from that was not a sewer-like place. After walking 30 meters in a straight path he was greeted by a spacious room.

The room had a wide of 20 square meters. And the hight of the ceiling from the ground was at 15-18 meters tall, this was only Yeman's estimation. He's wondering what kind of place was this. In the middle of the room, there was something that resembled an altar?

That's not all, there were also giant cylinders that even a middle-age man could enter without difficulty. About 8 huge dusted cylinders that were surrounding the altar and were connected to each other through rusted pipe tubes. The pipe tubes were one and a half bigger than an ordinary size bamboo.

Yeman first impression was— the place looked like an abandoned facility or an old laboratory. Although the cylinders weren't as polished as the cylinders in the modern era of the earth it was still a cylinder that usually could be seen inside a facility or laboratory; however, no computers or any widescreen monitor that was usually used in a modern era facility or laboratory could be seen inside.

In this room, Yeman had noticed another thing. That there were many crevices located in walls, grounds, and even at the ceiling. After a few moments, he heard a warning from his pet Elder Priest.

From these crevices, rats with name Rat Crawlers above their head jumped out of the hole. The supposed to be three fingers on their hands was replaced by claws. These claws were too sharp that could even tear the wall around the room. Maybe even the rusted pipe tubes would tear apart if hit by these claws.

They ambushed him and attacked in all front. They don't even give care to Elder Priest which standing alone at the side while watching the ongoing fight. Maybe they still have thought that Elder Priest was one of them.

Elder Priest was ordered by Yeman to not interfere with the battle.

The approaching attacks of Rat Crawlers were quick and fast. Some of them tried to grab Yeman's feet, maybe to drag him below the ground. Even Yeman felt the threat if these fellows succeeded in dragging him into the ground. Yeman believed that these crawlers seemed the agile type of enemy. But before their claws landed on their target, the target has gone without a trace.

Question marks floated above their head and a moment later, the monster cries and groans could be overheard inside this mysterious room. One by one the monsters fell down with wounds in different parts of their bodies. It looks like these monsters have no perception ability either. They couldn't catch him when he was using his sneak skill.

Some of the monsters have rolled an object which unknown for Yeman. Well, since he didn't bring his backpack he could only take one.

Not only the monsters rolled an object from their bodies, but Yeman also receives Soul Points every time he killed a monster.

He wasn't able to kill all the Rat Crawlers, because some of them managed to escape into the crevices.

Yeman glanced at his pet Elder Priest. Above its head was a green bar and above the green bar was its name and level. On its level displayed the number 17. The Elder Priest had 2 available skills as of now. The first one was Health Regeneration and the Second skill was Minor Heal.

Yeman tried to ask his pet about the room but it seemed even Elder Priest have no idea of what this room was.

They continued their advance until they encountered the knuckle user rat.

But with Yeman's Finger Bullet skill, the rats couldn't even manage to get closed.

Until they encountered an armor-wearing rat. Yeman was having difficulty in killing the kind of rat because it wielded a shield on its left hand. His Finger Bullet couldn't penetrate the shield.

The armor-wearing rat tried to bump by tackling him. But Yeman again used his sneak skill. And a question mark floated above the monster's head.

He appeared behind the monster and touched its head using his left hand. Suddenly the monster was enveloped by electricity. Then it fell limply on the ground and lost its ability to move.

But the monster wasn't dead. It was still breathing but couldn't move. All of a sudden, a smile leaked on Yeman's face.