Overlord: Start from the Goblin Lair.

Ask Nature is one of the top spells that rangers can obtain from nature. With this spell, they temporarily become part of nature and gain information about the surrounding terrain. The information can include but is not limited to terrain and water bodies, plants, animals, minerals or people distributed in the area, powerful celestial creatures, fey creatures, demons, elemental creatures or undead creatures, influences from other planes of existence, and buildings, etc.

Although this spell cannot cover one and a half kilometers of land as usual under the cave, more than ninety meters is enough.

"Goblin Ranger..." The Vampire Count didn't know what to say, just like when he first met Driver half a year ago.

A goblin can gain power far beyond his means, why can't he?!

"Oh, yes, yes..."

The goblin's voice came intermittently from all directions. It seemed that Driver was talking to some incorporeal being and getting the information he wanted from it. When the magic energy around his body gradually dissipated and he regained consciousness, his eyes flashed with bright light.

"Ron, Ron! Come here! I know what's going on here!"

"You know?" Ron and his team hurried over, looking at the reliable goblin hunter curiously, "What do you know?"

The goblin grinned, revealing two rows of white teeth: "Here, everything in this 'Renaissance Fortress'!"

"Fortress of Renaissance," Victoria didn't think Driver could come up with such a name, "but it seems to be just a tin house."

"It's a secret room, but a fortress?"

"That's because the place we are in now is just one of its rooms!" The goblin hunter interrupted the priest's questioning. He rushed to an ordinary position that would not attract any attention at all, and pointed at the fungi beside his feet. "Ron, come and clean up the dirt here!"

"Are you sure?" Sylvia walked over curiously, stretched out her hand to light a fire, and washed away the surrounding red mold and other vegetation for Ron. A thunderous sound exploded throughout the space, and a big hole was shaken out in the soil on the ground.

And underneath the soil is... still soil?
"Driverdo, we're not in the mood for this kind of joke," Ivy frowned, "If there's really nothing here, let's just go back..."

"What do you mean by just go back?" Driver was unhappy when he heard this. "It's not that there's nothing. It's just that Sylvia, you didn't put in enough effort and didn't completely shake off the top layer of soil!"

"You are talking nonsense! This layer of soil has not even shown any sign of bottoming out after receiving a thunder wave. Are you kidding me?"

Driver hurriedly grabbed Sylvia who was about to finish work and said, "What's the problem? Don't forget how many years it has been since anyone has been here!"

"From this guy," he pointed at the vampire lord, "from the time he and his wife came together to this day, it must have been four or five centuries, right?"

"This relic is older than him. I'm afraid it's a full thousand years old! With so many fungi growing here, isn't it normal for there to be more soil?"

A thousand years, ten centuries, for Gillianis, it was probably just a matter of her parents' generation, but for them, especially the goblins whose lifespans were shorter than humans and who rarely lived to the end of their lives, the things that happened a thousand years ago were no different from myths! "Okay, okay, I'll try again!" Sylvia was so annoyed by the goblins' rare entanglement that she had no choice but to agree to try again.

With a roar, a wave of thunder swept from Sylvia's body to the ground. This time, the expression on the vampire's face changed slightly. Not only her, but also the people around her were cheered up.

Got it! At the end of the thunder just now, there was clearly a sound of metal colliding!

There actually is something underneath!
When the spell ended, Ron moved forward and looked down. Under the half-meter thick layer of soil, the shadows were reflecting a cyan-gold metallic luster.

There is indeed another barrier below!
"The speed at which the soil is accumulating is obviously wrong," Gillianis leaned over and scooped up a handful of soil to carefully observe the material and structure inside. "For normal soil, even if no one is disturbing it, it would only accumulate a dozen centimeters in a thousand years."

"There is obviously magic interfering with this soil. In their hometown, the elves usually use thinner soil than this for planting. Even so, it is enough for the elves to grow enough food in the clearing in the forest."

"Then the 'enough' food will be taken away, leaving the farmers starving... Forget it, just treat it as nonsense, Lady Gillianis." Anastria turned her head away.

"I can understand planting in the woods, but this is underground, in a metal house," Ivy was puzzled. "What are they going to plant, mushrooms?"

Why would you need to be so extravagant as to use such soil to grow mushrooms!

"Maybe the answer is down there," Ron leaned over and jumped down, "Who can help me light it up?"

Victoria responded, and a faint twilight halo enveloped Ron, allowing him to clearly see the situation under his feet and around him. After driving away those large insects that didn't know how to live or die, Ron paused and reached out to touch the lines on the metal.

The structure above is similar to the metal door that was opened before, the only difference is that it is a sliding cover and a flip cover.

"This is also an entrance, just like the door at the entrance to the cellar, but it's encrypted," Ron made a judgment. "Driverdo is right. This might really be a fortress!"

It is no wonder that Count Richthofen and his wife could not find any other clues. The entrance was buried half a meter deep in the soil, and there were no landmarks around it. Even if they knew there was a layer of metal underneath, it would be useless because they could not accurately find the next entrance!
The light of the protective spell lit up alternately on Ron's body. Since he didn't know what was below, he had to act carefully. He even cast flying and spider climbing on himself in advance, and prepared the phantom step to deal with the bizarre rules of various situations. After preparing, Ron stretched out his right hand and pressed it on the metal plate under his feet.

Accompanied by a huge vibration and the roar of mechanisms, in the violent shaking like an earthquake, all the means Ron prepared were useless except for the flying technique.

Ron, suspended in the air, looked in astonishment at the heavy metal floor and the dark, bottomless cave beside him. He thought for a long time but could not figure out one thing:

Why does it need to be made into an upward-flipping door for such a huge volume? ! (End of this chapter)