In the dark passage, countless red eyes appeared, which were the eyes of the mutant demon rat, and the dense eyes made people's hearts chill.

Soon the mutant demon rats couldn't help it, and rushed towards Su Lun and the two, these mutant demon rats were not high in their own strength except that they were faster, more numerous, and could spread the plague, Su Lun was worried that these rats would spread the plague in his territory after they ran out.

In this era, health care was almost non-existent, and once the plague broke out on a large scale, the damage caused was very great, and in addition to the plague, this creature could also transmit a variety of diseases, which was very difficult. The mutant demon rats swarmed up, and Su Lun's long sword swept, directly cutting a mutant demon rat that pounced on him in two.

As soon as the dead mutant demon rat fell to the ground, it was eaten by the other mutant demon rats, and the remaining mutant demon rats did not have the slightest fear, but became even more crazy.

"Squeak!"

After a commotion, a larger number of mutant demon rats rushed up, and in the face of this situation, others might still be in a hurry, but Suren and Ayton are both agile and fast, and this level of offensive has been experienced too many times in the two training games.

Ayton's expression was cold, but the movements of his hands were not slow at all, and the scimitar drew a graceful arc, directly slashing the three mutant demon rats that pounced on him into six pieces. Su Lun's sword shadow filled the sky, and all the mutant demon rats that entered within one meter of his body were either cut in two or stabbed in the heart and throat, without exception.

However, there are too many of these mutant demon rats, and after smelling the smell of blood, they become more and more crazy, and they are completely fearless of death, and Su Lun frowned when he saw it.

Looking at the mutant demon rats that surrounded him, the thunder light on Su Lun's body flickered, and the next second, a burst of thunder suddenly broke out.

"Thunderstorm!"

A thunderbolt shot out in front of him with Su Lun as the center, and the blue-white thunder light was extremely dazzling in the dark passage, and the crackling thunder sounded into a piece, and a smell of barbecue quickly filled the passage.

"Puff puff!"

A large number of mutant demon rats in the passage were electrocuted into charcoal, and the ones that fell from the walls of the passage were ripe before they hit the ground. The electric light radiated outward, and more mutant demon rats were paralyzed by the thunder light, their muscles twitched, and after a while, they lost their breath, and the thunder lasted for a while, and then slowly disappeared.

Su Lun didn't use spells, but relied on his own thunder and lightning control ability, the best way to face the siege was to use spells, and he had to fight for a long time with a sword, but a range spell could easily solve it.

The thunder dissipated, darkness returned to the passage, and the ground beneath his feet was covered with the corpses of mutant demon rats. didn't stay any longer, the smell of meat just now would definitely attract the surrounding monsters, and Su Lun didn't want to continue to fight with these monsters here endlessly.

This passage should also be a pit, but I don't know who mined it, and there is nothing good, so the two continue to go deeper into the passage.

After walking along the passage for about half of the vanished, the narrow and cramped passage finally came to an end, out of the passage, the underground world in front of me was much empty, although there was no sunlight in the underground world, but there were many fluorescent plants, and the most widely distributed was fluorescent moss.

These glowing glowing fluorescent mosses bring a glimmer of light to the dark underworld. Dotted with dotted ghostly lights, Su Lun also roughly saw the space in front of him. It's a huge underground cavern, about the size of a stadium, and it's rocky and desolate.

Several underground salamanders hunt in the rocks, these underground salamanders are nearly three meters long, have a layer of rock-like scale armor on their bodies, and have sharp claws, which are not too strong creatures in the underground world. The surrounding rocks flickered from time to time, and Suren slashed at the rock wall with his sword a few times, and then looked at it.

Soon Suren found a lot of ores on the surrounding rock walls, crystals, silver ores, iron ores, copper ores, and many of them were found, but they were basically scattered and had no mining value, but even so, Su Lun realized that the mines in the underground world were indeed very rich.

Dig out a few pieces of silver ore casually, these silver ores should be associated ores, the purity is not high, Su Lun dug a few pieces and gave up. In addition to some white crystal, citrine amethyst, Su Lun also dug up some other gemstones, moonstone, fluorite, malachite, agate stone, topaz stone.

It's just that the purity is average, the volume is not large, the value is okay, the most valuable gemstone is still the high purity of the big value, of course, because the color of the gemstone is different, the most valuable is the ruby, and then other gemstones of various colors diamonds and jadeite.

The underground world is very vast, the hole in front of you is only a small part of it, there are other passages connected to the passages here, the underground world is composed of these holes and passages, some underground hollows can easily accommodate a city of 100,000 people, and some can only accommodate a few people.

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

After searching the cavern and finding nothing of value, the two left and continued on their way to another passage that linked to the place.

This passage is much wider than the previous one, and in addition to some fluorescent mosses, there are also some mushrooms, which are of many species and are the most common plants in the underground world, some edible and some highly poisonous. Many dungeons grow large quantities of mushrooms for food.

Some mushroom species will grow very tall, more than ten meters high, looking like a giant umbrella from a distance, and look very beautiful surrounded by many fluorescent plants, but these superficial beautiful things in nature often hide great dangers, and those mushrooms are often surrounded by some other creatures attracted by mushrooms.

After passing through the passage, Su Lun and the others came to another underground cave, which was different from the barren underground world before, and this cave was a different scenery.

The cave is a little damp, there is a layer of dirt on the ground, and in the distance there is an underground forest growing very luxuriantly, with fluorescent mushrooms, vines, mushrooms, etc. There are many fist-sized fluorescent mushrooms on the outermost periphery, and in the middle of the forest there are huge mushrooms four or five meters high, with huge umbrella lids emitting light, some fluorescent spores floating around in the air, and even taller mushrooms next to them.

With the dim light of the underworld, Suren saw that there were many long-dead corpses in the forest, and it was clear that this forest was not intended to be as beautiful as it seemed.