In the dark passage, countless red eyes appeared. It was the eyes of the mutant demon mouse. The dense eyes made people feel chilly.

Soon the mutant demon rats couldn't help it, and they rushed over to Su Lun. These mutant demon rats were faster, more numerous, and capable of spreading the plague. Their strength was not high. What Su Lun was worried about was this. The rat ran out and spread the plague in his territory.

The health and medical conditions of this era are almost non-existent. Once the plague breaks out on a large scale, the damage caused is very great. In addition to the plague, this organism can also infect many diseases, which is very difficult to deal with. The mutant demon rat swarmed up, and Sulun's long sword swept across, directly cutting a mutant demon rat that came up in two.

As soon as the dead mutant demon rat fell on the ground, it was eaten by other mutant demon rats. The remaining mutant demon rats were not afraid at all, but became even more crazy.

"Squeak!"

After a commotion, a larger number of mutant rats rushed up. In the face of this situation, others may still be in a hurry, but Sulun and Ayton are both agile and quick to respond. This level of offensive is training. Too many times in two games.

Aiton's expression was cold, but his hand movements were not slow at all. The scimitar made a graceful arc, and directly cut the three mutant rats that came up into six segments. The sword shadow of Su Lun was all over the sky, and all the mutant rats that entered within one meter of his body were either chopped in two or stabbed in the heart and throat, without exception.

However, there were too many of these mutant magic rats, and after smelling the blood, they became more and more crazy, completely in a posture of fearless death, watching Su Lun frowned.

Seeing the mutant demon rats surrounding Su Lun, lightning flashed on Su Lun's body, and suddenly a burst of lightning burst out in the next second.

"Thunderstorm!"

A piece of thunder and lightning shot out in front of him centered on Su Lun. The blue and white thunder light was extremely dazzling in the dark passage, and the crackling thunder sounded into one piece, and a smell of barbecue quickly permeated the passage.

"Puff and puff!"

A large number of mutant rats in the passage were electrocuted into coke, and the ones that rushed down from the passage wall were already cooked before they landed. The electric light radiated outwards, and more mutant rats were paralyzed by Lei Guang's body, their muscles twitched, and they lost their breath after a while. The thunder light lasted for a while before slowly disappearing.

Suren was not using spells, but relying on his own lightning control ability. The best way to face a siege was to use spells. Using a sword would take a long time to kill, but a range spell could easily solve it.

The thunder light dissipated, the darkness returned to the passage, and the ground under his feet was covered with the corpses of mutant demon rats. Without staying, the smell of meat just now would definitely attract the surrounding monsters, and Su Lun didn't want to continue fighting with these monsters endlessly here.

This passage should also be a mine, but I don’t know who mined it, and there is nothing good about it. The two continued to go deep into the passage.

After walking along the passage about half of it disappeared, the narrow and cramped passage finally came to an end. After exiting the passage, the underground world in front of you was much empty. Although there is no sunlight, there are many fluorescent plants growing in the underground world, which are the most widely distributed. The one is fluorescent moss.

These dim light-emitting fluorescent moss brings a ray of light to the dark underground world. With the dots of gloomy light embellishing, Su Lun also roughly saw the space in front of him. This is a huge underground cavity, about the size of a stadium, with rugged rocks inside and looks very desolate.

A few underground salamanders prey on the rocks. These underground salamanders are nearly three meters long, have a layer of rock-like scales and sharp claws. They are not too strong creatures in the underground world. The surrounding rocks flickered occasionally, and Su Lun chopped a few times on the rock wall with a sharp sword, and then checked.

Soon Sulun found a lot of ores on the surrounding rock walls, including crystals, silver ore, iron ore, and copper ore. Many of them were found, but they were basically scattered and had no mining value, but even so. Let Su Lun realize that the underground world mine is indeed very rich.

I dug out a few pieces of silver ore. These silver mines should be associated mines, and the purity is not high. After digging a few pieces, Su Lun gave up. However, the crystal mine gave Su Lun a little surprise. In addition to some white crystals and citrine amethysts, Su Lun also dug up some other gems, such as moonstone, fluorite, malachite, agate stone, and topaz.

It's just that the purity is average, the volume is not large, and the value is reasonable. The most valuable of the gems is the high purity of the big and valuable. Of course, because the price of different colors is different, the most valuable is the ruby, and then the others. Various colors of gems, diamonds and emeralds.

The underground world is very vast. The void in front of you is only a small part of it. There are other passages connected to the passages here. The underground world is made up of these cavities and passages. ~lightnovelpub.net~ Some underground cavities are large. It can easily accommodate a city of 100,000 people, but some can only accommodate a few people.

It is also because of the peculiar structure of the underground world that the underground world is divided into city-states, each of which occupies a vast void.

After searching the hole, the two of them didn't find anything else of value before they left and went on to another channel linking here.

This passage is much wider than the previous ones, and besides some fluorescent mosses, there are also some mushrooms growing. These mushrooms are of many types and are the most common plants in the underground world. Some of the mushrooms are edible, and some contain fungus. poison. Many dungeons will plant a lot of mushrooms as food.

Some species of mushrooms grow very tall, with a height of more than ten meters. It looks like a giant umbrella from a distance. It looks very beautiful surrounded by many fluorescent plants, but in nature, these beautiful things on the surface are often But there is a huge danger hidden, and there are often other creatures attracted by the mushroom grass around the mushroom grass.

After passing through the passage, Sulun and the two came to another underground cave. Unlike the barren underground world before, this cave was another kind of scenery.

This cave is a bit damp, and there is a layer of soil on the ground. In the distance, there is an underground forest where fluorescent mushrooms, vines, fungus, etc. grow very luxuriantly. There are many fist-sized fluorescent mushrooms on the outermost periphery. In the middle of the forest, there are huge mushrooms four to five meters high. The huge canopy emits light, and some fluorescent spores are scattered in the air. There are taller mushroom grass beside it.

With the help of the dim light of the underground world, Sulun saw that there were many long-dead corpses in that forest. Obviously, this forest did not want to look so beautiful on the surface.