The "boom" explosion echoed in the sewer, and in the light of the explosion, he calmly put his sword in the fire, and there were at least twenty small combat puppets behind him. The four of them had been in the sewer for more than three days. During these three days, the four people kept walking back and forth along the pipe, searching for the enemy's traces bit by bit. Since Annie could only sense whether the resentment of her soul existed and could not sense the concentration, everyone could only search along the route that the other party had taken little by little, and could not accurately determine the position of the other party's recent time.

Fortunately, there are maids and sisters. With the help of them, you can at least tell where you have searched and where you have not been there yet, so that you will not pass through the same location many times. According to the idea of ​​Catherine and Vivian, keep looking at this rhythm. Even if you follow the most pessimistic estimate, search all the places that each other has visited, and you can finally find the traces of the enemy. As long as you find the hidden position of the other party, quietly repay the indulgence and enthusiasm, and take them down to raid the enemy, the mission of the adventure team will be completely over.

However, the past three days have not been easy. The number of puppets destroyed by Catherine and Vivian along the way is no less than 400. Now, when the maids and sisters see the hideous puppets, they have gone from being nervous at the beginning to being indifferent now. In the end, if conditions permit, the two sisters even want to take out snacks while eating them while cheering for the two professionals in the battle.

Of course, the actual battle was not so easy. Every time they encountered a puppet, the number of puppets was not constant. At most, fifty puppets appeared at the same time. For a moment, the surroundings were full of metal friction sounds and the sharp screams of the chain saw turning. That time, the maid sisters were ready to welcome death. They knew very well that under so many puppet attacks, it was difficult for Catherine and Vivian to protect themselves, and it was impossible to have time to take care of their safety.

Fortunately, due to Catherine's advice, the two did not run around in critical moments, but hugged together against the wall, silently waiting for the enemy's attack, preparing to make a dying struggle. This choice just created a chance for Vivian to rescue. So, under the spell of Vivian's ice barrier, a thick and hard frost wall covered the two sisters, sealing them within the frost barrier, not only providing them with protection, but also isolating their life breath. After the metal puppet that used the breath of life to win the enemy lost its target, he immediately lost interest in the extra ice cube out of thin air, and turned all his attention to Catherine and Vivian. More than fifty metal puppets waved the close-fitting and medium-range weapons at the end of their arms, and issued the most fierce attack on the two adventurers.

The battle was very strange, completely different from the usual way of Katherine defending Vivian's attack, but the characters were completely in tune. With a one-meter circular area around the two, Vivian created an impact field and maintained it with all his strength. Any puppet close to this field will be bounced far away by simple magic impact, thus creating a safe space. In the safe area, Catherine, in addition to constantly blocking the crossbow arrows shot with shields, mainly focused on attacks. The one-handed sword always stabbed continuously at the most appropriate time, piercing the armor on the abdomen of the puppet. It completely destroyed the puppet's central control device.

Even if two or three swords can be used to destroy the puppets, Catherine almost consumed all the fighting spirit when facing more than fifty puppets. After the battle, she almost collapsed to the ground. Although Vivian's mission is lighter than Catherine, the consumption is not lower than Catherine. Maintaining the impact field for a long time makes Vivian also pale and stagger, almost causing the magic to be temporarily disordered and lose the ability to move. Fortunately, both of them still persisted. Only Catherine had five more minor injuries on her body, and Vivian miraculously intact. It has to be admitted that this is the most perfect result. As for the maid sister who was locked in the ice barrier and almost died due to suffocation, it was just a small accident and did not affect the overall situation.

"Squeak", several fat mice crawled past the feet of several girls, quickly turned into the branch fork and disappeared. Immediately, a badger-like monster slightly larger than a domestic cat chased after him, and also ignored the four people on the way, followed the mice into the fork.

"I think it's strange." Catherine looked at the fork in confusion at the disappearing road of the mouse: "There are so many small animals and monsters here, what do they usually eat?"

"There are a lot of food to eat." Vivian replied: "The above these branch pipes are buried deep in the soil. The food there is rich, well, at least it is very rich for mice. The rhizomes of various plants, various insects, and various fungi can provide the mice with sufficient nutrition. Other carnivorous monsters can naturally feed on mice and form a complete food chain."

"The poor food chain at the bottom." Katherine shrugged: "So, if someone is lost in this, maybe he can survive."

"Well, I feel so too." Vivian nodded and said, "The premise is that he can run faster than a mouse, his body can be harder than a clean puppet, and he can endure long-term loneliness and not drive himself crazy."

"Shh." Catherine suddenly interrupted the meaningless nonsense between the two, and used the hearing strengthened by the fighting spirit to distinguish the sounds around in the air: "I vaguely heard a sound in front of me."

"It's normal to have a sound." Vivian said indifferently: "Didn't you hear it yesterday? Cleaning puppets that were alarmed by other monsters, and thanks to them to cover up our voices."

"It's different. This is not a fighting sound, it's a weird sound." Catherine frowned and said, "It's a bit like the kind of friction that makes people feel sour after something metal breaks, and then moves back and forth."

"Uh, my dear sister, you don't need to describe it as vivid." Vivian rubbed her arms and said with a grin: "I feel uncomfortable all over my body just thinking about it. Should we go over and see what it is?"

"There are undead creatures there." Annie suddenly came out again, pointing to the branch pipe that everyone was facing and said: "I felt that there were many undead creatures there, but the distance was very far. The location was quite scattered."

"Annie, then you're feeling it." Catherine said: "Have our target been there?"

"No, I can't feel the smell they left behind." Anne hesitated for a while and shook her head, "But I feel that something special seems to be there... Well, it's too far. It feels too blurry."

"What's special?" Vivian thought for a moment and asked Anne, "Is it important to you?"

"I don't know, I just think it's a bit special." Annie shook her head: "The distance is too far, I can't figure it out."

"Forget it, I can't go there first." Catherine thought about it for a while, but gave up the idea of ​​exploring: "Do the main business first. If you really care, find a chance to see it after finishing the main business. Now that Lina is not here, there is no need to have a conflict with the undead."

"But, Sister Catherine." Annie pulled Catherine's arm: "There are dead on the front roads."

"Yeah!" Catherine and Vivian were stunned at the same time: "Everything?"

"Yes. Those people have passed this road." Anne pointed to another widest main channel: "But there are also undeads in front of it, and there are many. Although the other roads do not have the taste of those people, there are also many undeads."

"It's so troublesome." Catherine sat down on the spot with a headache, waved to the others: "Sit down and rest, and study what to do."

"There is only one way, no matter what, you have to go on." Vivian opened the water bottle and couldn't wait to fill half a bottle of water. She licked her dry lips and said, "Since I decided to use this kind of investigation-based search method, I must not let go of any possible location. Otherwise, if we go around here and look elsewhere, if they hide here, we will never find it in our lifetime."

"But how could they pass through the large group of undeads in front of them?" Catherine shook her head and said, "I prefer that they once tried to pass through here, but because they were attacked by a large number of undeads, they had to withdraw and find other paths again. Therefore, the area we explored before would have so many paths that they left behind.

"But..." Vivian was about to speak when a slight vibration suddenly occurred on the ground beneath her. A faint roar continued and came along the pipes of the underground waterway. The sound seemed to be not far away.

"What?" The two adventurers jumped up on the spot, staring at the direction where the voice came with a serious expression: "It seems like a big guy."

"The roar is like footsteps." Catherine said with a somewhat ugly face: "The vibration is also like that. But how can there be something in the sewer that can make such footsteps? It's not a large monster."

"It would be fine if it was a monster." Vivian said with a trembling corner of her mouth: "If it was a metal puppet, it would be miserable. The metal puppet that could make such a sound would probably be more than we imagined."

The "drip" sounded in the pipe two or three hundred meters on the side, and the mechanical goblins that the four people had heard many times. This time, this completely incomprehensible language was different from usual. It seemed that they were pronunciating while moving, and the sound was getting closer and closer to the position of the four people.

"Come for us." Vivian and Katherine looked at each other: "It should be."

"There's no choice, just back slowly." Catherine stood in the last position: "Since there are undead around, let's retreat to the road we target once went and try to avoid this big guy."

As it turns out, sometimes the idea is good, but the truth always makes some jokes with people. The four people's slow concessions did not allow the objects that made huge footsteps to shift the target. The other party seemed to have identified them and walked towards the four people without any deviation.
Chapter completed!