The eleventh floor was fascinating to look at. It was completely made of black coloured crystals. Those crystals were radiating multicolored light which made the whole floor look very mystical. Ok this floor, the enemy didn't show up as soon as they entered the floor so, they were able to appreciate the beautiful view that this floor had to offer.

After the group went a bit far inside suddenly a few large crystals fell from the ceiling. Then those crystals turned into humanoid monsters. They were a special type of crystal golem. But one thing that made all the teachers a bit scared and that was these monsters levels. All of them were between levels 230-250.

The A rankers took the lead fighting against them and B rankers supported them. But these crystal golems were really troublesome to deal with. They had a special ability to reflect back most magic spells and their defence was also quite strong. So, it took more than 3 hours for the teachers to beat them.

Then again as soon as they walked for 5 minutes or so, more crystal golems fell from the ceiling again. This same routine repeated three more times and every time the golems got stronger than before. But the teachers were still able to handle them somewhat but it took a lot of time. After clearing the 6th group of crystal golems all the teachers decided to call it a day.

...

The next morning, again they continued their journey. But the first encounter they had with the crystals this time was more scary as the B rank crystal golems this time had an A rank crystal general leading them. Even the B rank crystal golems were troublesome for the A rankers, so the A rank crystal golem general was even worse. Elena had to step in this time and she again had to become the "omniscient problem solver" again.

After that they faced many groups of crystal golems with a crystal golem general leading them and every such time Elena had to take action. As they reached the mid point of the floor, they saw a 30 meter tall crystal there. It was a S rank monster and the origin of all the crystal golems. But this monster could not move so the expedition team was able to ignore it.

Then finally they were able to find the stairs to the 12th floor but everyone was insanely tired after fighting all day so they decided to stay the 5th night on this floor and enter the next floor fresh on the 6th day.

...

The next floor had a lot of mini ferocious spirits roaming it. They were not very strong, only between level 80-99 but their numbers were in millions. They also had a special ability to deal a certain amount of damage on contact. The amount of damage was very low but with millions of them doing so it became fatal. And most annoyingly this damage was certain as anyone below level 300 could not defend against it at all.

So, on the 12th floor, not only the teachers but also the students participated in the battle. Elena made a rotating schedule and created a stronghold on this floor. From there, the students and teachers fought non-stop against millions of little ferocious spirits for 3 days and 3 nights. Whenever someone had taken a dangerous amount of damage from the spirits, he would fall back and another person would come forward to take his position. Like that they were able to exterminate all the little ferocious spirits but they also lost one teacher from the Sky Parade Academy who misjudged his endurance and paid dearly for it with his life.

...

On the ninth day they finally entered the 13th floor. Although the other teachers had no idea about it, the teachers from Riplanica Higher Institution and Elena knew that this floor was the last floor of this dungeon, where the all important altar was located.

This floor looked like an ancient ruined city. There were several half broken buildings like structures. The expedition group found themselves at the very edge of the city. The only structure that was still standing was a very large palace in the middle of the city.

As Elena and her group entered the city they saw high level black ferocious spirits standing in the road. But unlike last time, they didn't attack Elena's group this time. They all looked like they were in some kind of trance. Some teachers asked Elena if this was her doing but Elena replied in the negative, which bewildered the teachers even more.

As the teachers from Sky Parade Academy and University of Sousion were looking at the city with amazement, the group from Riplanica Higher Institution were getting excited as they were reaching the final phase of their plan. They were also a bit nervous as Elena was stronger than they expected. But actually they didn't have much idea about the strength of a S ranker. So it was also possible that Elena's strength was normal for a S ranker. At least they wanted to believe it badly.

The students were very excited after they were able to contribute against the little spirits in the last battle. Now they were getting a bit restless after seeing the ruins of an ancient city. So, firstly Elena attacked one of the stationary spirits and lured it toward her and let the students fight against it. They tried their best to attack but those attacks were useless. So soon all the students who wanted to search the city themselves were subjugated and were on the verge of death. Elena then saved them at their last moment and that experience gave them the reality check. So, after that the students quieten down.

After discussing a bit all the teachers decided to go to the intact palace first as that looked like the most important structure even before the city got destroyed. As they were going through the dilapidated part of the city, they saw many golems and ferocious spirits wandering about. But none of them attacked their group.

Soon they come across a new type of ferocious spirit that they had never seen before. This spirit looked like the grim reaper from Elena's home world. It also had a scythe equipped. It was a strong A ranker with an impressive level of 280.

As none of the previous monsters had responded to the group's presence unless they attacked the monsters. So this time too, the teachers didn't pay this spirit any mind and went past it. But this spirit was different. It didn't ignore them instead it attacked the group by swinging the scythe. One B rank teacher almost died but an A rank teacher who was near him saved his life. Soon the teachers started fighting against this grim reaper spirit.

Some of them feared that all the other spirits and golems would also start attacking them as one of the spirits did but nothing like that happened. Soon they were able to defeat the spirit with a little help from Elena. After that incident Elena's group tried their best to ignore such spirits. But still they had to fight for two more times. Once against a golem that looked like a broken building and another time against a group of dog-like puppets.

After ignoring most of the encounters and fighting only when they must, they finally reached the front gate of the palace.

Now what more surprises would wait for the group inside this mysterious palace.

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