The underground floor is equivalent to the reception area. There is not much important stuff in the first place. In addition, since the tyrannical demon king disappeared, adventurers have searched for it for twenty years. It can be said that not a single hair is left. Even the walls have been scraped off.

See if there is a secret passage or something.

But once they reach the second floor, everyone has to stop chatting and concentrate on work.

Since there are mostly no obstacles between each floor starting from the second floor, there is a certain possibility that monsters on the lower floors will run up.

For example, there were alien creatures summoned by ritual magic, experimental creatures used to study new potions, magical creatures created by magic, and alchemical creatures like the golems in the school library.

And as mentioned before, it is easy to accumulate negative energy underground, and the probability of undead creatures appearing here is also very high.

Alton walked at the front to explore the way, wearing sunglasses similar to swimming goggles on his face.

It is a magic item called the 'Eye of Night', which can provide 20-meter dim vision. That is, in dim light, you can still see things as clearly as daytime. Even in the darkness where you can't see your fingers, you can still see things clearly.

It provides dark vision of about 5 meters. I heard that Alton said it was left to him by his father who was an adventurer.

Gary, who was covered in heavy armor, carefully controlled his footsteps and followed closely behind. As a human shield, he had to ensure that he could block any attacks fired at the back row.

Perrenli and Priest Fondar had relatively little to pay attention to. They used light spells one after another to provide lighting for the team. Just pay more attention to the left, right and behind.

Since the four people are a standard adventurer team, the formation used when moving is also very standard, and they look like they are facing a powerful enemy.

In fact, the second floor is the same as the first floor, and nothing is left after being explored. If the first floor is 100% fully explored, the second floor is 95% explored, and the remaining 5% has no walls scraped.

Skin……

So when everyone moved forward and opened the doors on both sides of the corridor to see if there was anything inside, they could only see an empty room where even the tables, chairs and benches had been taken away by previous people. At most, there were some scattered waste papers.

The only thing worth mentioning is that they once opened a rather strange room on the way. Inside, they could see a door with a completely different shape from other rooms, and there were more than a dozen buttons beside the door.

This thing that looks like an elevator is really an elevator. The difference is that it is driven by magic. And it has long been out of use due to lack of energy and lack of maintenance.

But even if it could be used, no one would rely on it to move forward.

The underground of the school is extremely complex, with countless secret doors and confusing mazes. Moving in an elevator will not make exploration any easier. Moreover, if you encounter danger, you may die in an elevator in a narrow and airtight environment.

Very miserable.

Everyone discussed for a while, and since there was nothing to loot on the second floor, it would be better to speed up and go directly to the third floor, keeping vigilance and nipping in the bud.

Despite the fact that the teacher had reminded them that they could not go below the fifth floor, in fact, no one even planned to go to the fifth floor. At most, they would return after searching on the fourth floor.

The higher you go, the higher the risk. Everyone knows how much they weigh.

Even without searching to speed up the pace, everyone walked along the passage for almost twenty minutes. According to the markings on the map, they should soon reach the entrance to the third floor.

But at this time, something unexpected happened.

Alton, who was exploring the road, gradually came to the intersection. This kind of place that is almost a 90-degree turn is easy to "encounter love around the corner", so he must carefully explore in advance.

He glanced quickly, then gestured to the others behind him, and waited until they came closer before lowering his voice and saying:

"There's something that looks like an undead creature on the other end, but I've never seen it."

When everyone heard this, their heads popped up from the wall.

It was about thirty meters away from the intersection where they were, and a skull was floating out of thin air. It didn't seem to have any purpose, as if it was simply circling there.

The skull is covered with a thick layer of green flames, which is really scary in the flickering magic lights.

"That can't be a demilich! I've heard that some lichs only have one head left."

Even though he tried his best to suppress it, Vondar's voice seemed to be strangled.

Liches are undead creatures transformed by powerful mages in order to gain eternal life. Special magic rituals are required, and not just any miscellaneous fish can be transformed into lichs. The minimum guarantee level is 50.

In the evaluation of the Demon King System, Pei Renli is only level 17 now...

"That's not a demilich."

Alton didn't know what it was, and Gary and Von Dahl didn't know it either, so the three of them all looked at Perrenli who was speaking.

Not many students in the Adventurer School are literate, and among them, Pei Renli is the one who runs to the library most frequently.

He recalled a little and said to the others:

"It should be the Flaming Skull."

As long as the environment is suitable, undead creatures can easily be born. Most of them are skeletons, zombies and ghosts. But the Flaming Skull is different. It is not a natural product, but an artificially created undead creature. It is no wonder that the other three

Don't know anyone.

This kind of undead creature is usually used as a guard or sentry, and its creation requires a certain level of magical attainments in the necromancy school. It was probably created by the mages who were doing research below twenty years ago.

No one cared much about the details. Alton asked:

"Is it easy to deal with?"

"The main body is easy to solve, but it uses magic and can use a fireball."

Although the name sounds weird, Fireball is actually the most powerful among D-level spells, even more powerful than many C-level spells. It is also the first choice for Master's output, and its popularity rate is very high.

Precisely because of its high popularity, everyone who has never heard of the Flaming Skull knows the power of the Fireball Technique. If the Fireball Technique explodes among four people, one of them will all die.

It was too risky to rush through directly, but the Flaming Skull just blocked the entrance to the third floor, so no one was willing to go back the same way.

Fondar thought for a while and said:

"I have ways to defend myself against the flames, but the timing is very important and I need your cooperation."

Although it is difficult to use the fireball technique, there is no perfect thing in this world, and the fireball technique certainly has its weaknesses.

Knowing yourself and the enemy is a great advantage. It is similar to playing a game and fighting a boss. The more information you know about the target, the higher your chance of winning.

Since no one wanted to go back in despair, everyone quickly discussed the strategy. After repeatedly confirming that nothing was missing, Alton and Gary rushed out of the intersection first, followed by Perrenli and Fondar.

Different from the usual formation, there is a distance of seven or eight meters between the front row and the back row. The purpose of this position is to avoid being caught by the fireball technique.

When it entered the 20-meter range of the Flaming Skull, the skull that was originally floating aimlessly in the air suddenly reacted. It opened its decaying jaws and looked at Alton and Gary who were rushing at the front.

Undead creatures have no sense of sight, hearing and smell, and the way they perceive the world is different from that of living people. The warning range of the Flaming Skull is only 20 meters. Beyond this distance, it will turn a blind eye even if you jump to the Pure Land.

The green flames surrounding the skull suddenly burst into flames, and the ominous firelight replaced the dim lighting of the magic lamp, making the area around it look green.

At this time, due to the rotation of the skull, everyone saw two red flames burning in its eye sockets, and the brightness suddenly increased.

——Chi!

The next moment, a sharp whistle sounded like something sharp breaking through the air, and two bright red rays shot out from the eyes of the Burning Skull.

What abilities the Flame Skull has? Pei Renli told them when they were discussing tactics just now, and no one panicked at all when they saw this scene.

Alton, who was running at the front, deftly did a forward somersault, and the scorching ray swept past his feet. Another ray was aimed at Gary. Of course, he couldn't do somersaults as he was heavily armored, but simply raised his shield to cover his face.

.

As a series of fire flashes like electric welding, the rays left clearly visible straight burn marks on his kite shield.

Pei Renli and Feng Daal behind them saw that the Flaming Skull launched an attack as expected, and immediately stopped charging. Pei Renli had finished weaving the runes with his left hand, and pointed at the skull from a distance:

"Magic Missile!"

The Burning Skull is relatively small, so in order to ensure that it can hit, Pei Renli chose a magic with built-in tracking capabilities.

The oval-shaped stance missile bypassed Alton and Gary who continued to charge from above, and hit the Flaming Skull in the head when it failed to make any reaction.

The old bones of an unknown number of years were knocked crooked by this blow. He turned slightly and looked at Pei Renli behind with eyes burning with red flames. The green flames surrounding them also crackled violently as if they were enraged.

Sound.

The slightly opened mandible roared silently, and a flame, not much bigger than a broad bean, condensed in front of it and shot towards Pei Renli like an arrow.

The fireball technique is indeed here!

Low-level undead creatures have little intelligence. They act with strong hatred for all living creatures, and their behavior patterns are relatively dull.

In this case, the reaction of the Flaming Skull can be easily predicted. What Pei Renli wanted was to target him with the fireball spell, so he deliberately fired a magic missile first.

At first glance, a flame as big as a broad bean seems completely harmless. However, anyone with a sense of magic will discover how amazing power is contained in that small flame.

Once the fireball technique is released, its power is no less than that of a mortar, or even as powerful as a large-caliber howitzer in the hands of a powerful mage.

It was perfect enough to make Pei Renli shatter into pieces.

But since it can be predicted, there is a solution.

When the flames flew towards him, Feng Daal raised his shield with the Holy Emblem of Moradin in front of Pei Renli and shouted:

"Protection from energy damage: Fire!"
Chapter completed!