On the sixty-ninth day, Rob and Lolo finally arrived at the seventh floor.
There were powerful magical beasts here, as well as terrifying traps and metal puppets. Even with Bevinadet leading the way, the two still slowed down.
Even Rob had to be careful here. The future Supreme Magister Your Honor released his mental strength to sense the dangers lurking around. Lolo also took out the small bottle of red glue from her bag. This thing was given to her by the ugly woman when she was healing Ao Grimm. Applying it on her body could effectively isolate her aura. Even a ninth grade professional would find it difficult to detect her.
When they were on the sixth floor, the girl gave it a try. Although she didn't know how the metal puppets searched for intruders, the good news was that the red glue was indeed effective against them. As long as the two of them applied it, even if they swaggered past the metal puppets, they wouldn't see them. Although the metal puppets on the higher floors were stronger, the mechanism of searching for enemies hadn't changed. Therefore, now was the time to put the red glue to good use.
On the second and third floor, Lolo and Rob could still find traces of adventurers. However, after entering the fourth floor, there were no other adventurers. It was as if the two of them were the only ones left in the world.
It was unknown who designed and built this underground city. Even after tens of thousands of years, the ecosystem inside was still well-maintained. The artificial sun, moon, and stars in the sky tirelessly alternated. Even if they were more than two thousand meters underground, they could still breathe fresh air.
Almost everything from the outside world could be found here, whether it was mountains, rivers, hills, or lakes … It was as if the creator of this world wanted to copy everything on the surface.
The more she saw, the more puzzled Lolo became. Since the creator of this underground city liked the surface so much, why would he build such a place deep underground? What were those towering mithril walls defending against?
As though he knew what she was thinking, Luo Bu explained, "This is the Starting Ground."
"Hmm?"
"This underground city is this world's first underground city. The other underground cities were built after it."
"How did you know?" the girl asked curiously.
"I once followed my teacher to explore a Dungeon. That Dungeon was perfect. Both the structure and the construction were done to perfection. However, compared to this place, it lacks the most important thing."
"What is it?"
"Traces of failure." Rob paused for a while before continuing, "This underground city wasn't built in one go. I noticed this when I first saw the drainage pipes in the inner city. There are many traces of modifications to the pipes. The designers made many attempts. Some succeeded, some failed. They kept the parts that succeeded and improved on them … In fact, it's not just the drainage pipes. Everything you see here has the mark of failure. The stars, the rivers, the sunrise, the valleys, every inch of land is the product of countless failures."
"Them?" Lolo grasped the key point. "Do you mean that there was more than one person who designed and built this underground city?"
Rob nodded. "Even with the technological level of that civilization, it's definitely not an easy task to build an underground city. It would require at least a few generations of wisdom."
"According to what you said, that civilization was once extremely powerful. Why did they decline?"
"We returned here to find the answer to this question," the future Supreme Magus Your Honor answered.
"Is this answer important to us?"
"Very important. If my guess is correct, they should have a solution to your problem." Luo Bu said. However, there was something else he did not say. If his guess was correct, then it was very likely that the human race was currently facing its greatest crisis in history.
"Oh," Lolo replied, but her focus wasn't on this. She paused and said, "These few days, I've been thinking … It's good for us to stay here. Doesn't conquering an underground city take hundreds of years? As long as we stay on the higher floors, no one will disturb us. We can spend the rest of our lives in peace and not cause trouble for others."
Luo Bu reached out to stroke Luo Luo's hair and said softly, "Okay, after I solve your problem, you can live wherever you want."
"Again. You're so sly." The girl sighed. "If this goes on, I'm afraid I'll get used to your gentleness."
"Isn't that good?"
"Yes. You must be doing this on purpose so that I can't leave you." Lolo's eyes were like seaweed swaying in the water, causing the youth's heart to flutter.
"Then don't leave me."
Under the moonlight, the boy gently kissed the girl's forehead.
Bevenadette stopped on a branch at the side and looked at the two people under the tree. At this moment, it was as if they only had eyes for each other. The beautiful bird snorted softly, as if dissatisfied with being stuffed with a mouthful of dog food.
However, at this moment, a meteor suddenly streaked across the sky. The meteor dragged a long tail across the night sky and fell towards the grassland in the north. Bevinadet's expression changed when she saw the meteor.
Then, Rob raised his head. He also saw the meteor. The future Supreme Magus Your Honor raised his eyebrows in surprise. "Key!?"
"What key?"
"That meteor is a key. It should be used to open a secret place on this floor," Han Shuo said. Luo Bu said, feeling a familiar aura from the key. If he wasn't mistaken, the one who made this key and the one who made this chest needle artifact were likely the same person.
Just as the two of them were talking, the ground suddenly shook. The powerful magical beasts that occupied the seventh layer all became restless. Most magical beasts at this level had a strong sense of territory and would not easily leave their territories. However, when the meteor streaked across the sky, they all walked out of their nests for the first time and ran towards the spot where the meteor landed. They looked like children rushing to snatch candy. Bevenadette, who was still standing on the tree, was nowhere to be seen. She did not hesitate to join the revelry.
Rob said to Lolo, "Let's go take a look."
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