Sora followed the markers all the way, from the first few hundred meters to the first few hundred meters, and now he can see it from time to time, and Sora feels that he should be very close to the interface between B2F and B1F.

If you can get to B1F smoothly, you may be able to rely on the positioning device to meet your father. The effective distance of the positioning device is 400 meters. Don't underestimate these 400 meters, it's already a long distance in a cave.

However, as the terrain continued to rise, the road became more and more difficult, and many places needed to be climbed empty-handed, but Nana was very relaxed, wearing the hook claws she had bought before, and with the speed and balance of the elves, she could almost fly through the walls of this cave.

"That's pretty much it." Sora carefully checked the map in his hand, and the spare flashlight had already been taken out, and now was not the time to save electricity.

The map doesn't depict much of the B2F, but with the constant markings along the road and the meticulous observations, it was difficult to determine its location.

"Huh? How can there be a fork in the road here? Am I on the wrong track? Sora took a few steps back, there was no fork in the map, and he had encountered this situation more than once, which caused great trouble to his trip.

After checking the map a few times, he made sure he was on the right track, and continued along the planned route. It is very likely that the fork just now was recently excavated by the Great Rock Snake, and Sora knows that the environment of the underground world cannot remain the same, and the Great Rock Snake will continue to dig new tunnels in order to eat, and even the entire Tsukimi Cave from scratch may be their credit. Sora didn't have time to care about these things now, he just wanted to get out of this hellish place as soon as possible.

Finally, he stopped in front of a spacious cave.

"Phew—it's finally here, the exit from the second basement!" Wiping the sweat from his head, he felt that victory was in sight.

"Bah!"

Sora was about to walk in, but Nana bit the leg of his pants. He'd noticed it before, and it seemed that the closer he got here, the more uneasy Ibrahimovic became. Could it be ......

Sora raised his flashlight and shone it into the depths of the cave, and suddenly saw a behemoth entrenched there silently.

This is...... Big Rock Snake?

The light from the flashlight didn't shine a full picture of the beast, but Sora recognized it at a glance based on its serpentine body and the dark gray rocks on it.

Recognizing the elf in front of him, Sora breathed a sigh of relief. The Great Rock Serpent is very docile, and despite its large size, it can live peacefully with the elves around it, and the tunnels it leaves behind are the nests of small elves such as gophers and Pyras.

But isn't the head of this big rock snake too big?

In the dimly lit cave, the head of this large rock snake looked particularly hideous. I didn't think much about it, there are many subspecies of the big rock snake, and maybe this one in front of me is too.

"Babble!" Seeing her master continue to walk forward, Nana became even more agitated, and kept screaming vigilantly.

Ignoring Nana's obstruction, he slowly leaned over. In his opinion, this is the reaction that a small elf should have when it meets a large elf, and it is normal for Nana to be uneasy when she sees the big rock snake for the first time.

"Don't worry, the big rock snake is very docile." Sora picked up the restless Eevee and comforted her.

"Bah-"

Sora didn't expect Nana to be quiet in his arms, but kept struggling.

"Boom!"

Perhaps it was their voices that woke the beast in front of it, and it moved as the mountains shook and the earth and rocks fell.

The huge head of the great rock snake slowly turned around and opened its bloody mouth at the two small ants on the ground that disturbed its sleep, and let out a silent roar. (Rock elves generally have no vocal organs)

Run!

The moment he saw the "Big Rock Snake" open his eyes, there was only this thought left in his empty head.

This is definitely not a big rock snake! Sora shouted in his heart as he quickly left the cave with Nana in his arms.

The pair of blood-red eyes that shimmered in the darkness were definitely not characteristic of the Great Rock Serpent. Sora had seen the illustrated book of the Great Rock Serpent in school, and its eyes were supposed to be translucent, like two white crystals, regardless of whether it was a subspecies or not.

Wait, red eyes, weird heads, bloated bodies...... Sora recalled.

Could this be a ...... Big steel snake?

The Great Steel Snake lives deeper underground than the Great Rock Snake, and its body undergoes qualitative changes under high temperature and pressure, becoming as hard as a diamond. Crucially, they are generally hot-tempered.

That's right, it's definitely a big steel snake. Therefore, there is not a single big rock snake near here, and the big steel snake will not allow the existence of elves of similar size in the territory, even if it is of its own kind.

"Wow!"

Sora was thinking about it, but he didn't expect a sudden violent shaking from behind him, knocking him to a stagger. One was unsteady on his feet and tripped over the raised rocks under his feet, and even Nana in his arms rolled out of the way.

"Shhh

Damn it! Sure enough, the [earthquake] that caused me to fall into the dark river was also sent by this guy?

Sora thought to himself with hatred as he struggled to his feet, rolling up his left trousers.

He had planned to rely on his familiarity with the area and leave the place before taking a long-term view. Although the Great Steel Snake has a harder steel body than the Great Rock Snake, its relative speed has slowed down a lot, and under normal circumstances, it can't catch up with itself. But now...... He looked at the large abrasion on his knee that kept oozing blood, and his heart kept sinking.

At this time, Nana ran over, saw that her master was injured, and cried softly, then leaned over and stretched out her little tongue to lick the empty wound carefully.

By the way, I still have Nana, as long as I'm with the elves, anything is possible.

Feeling the tingling sensation from the wound, looking at Nana, who had never been separated from herself, Sora ignited her fighting spirit again.

Since you can't run, let's fight!

At least, not here, though. Sora listened to the loud noise that was getting closer and closer behind him, and had an idea.

He took out the healing spray and gauze from his first aid kit to stop the bleeding from the wound, then quickly glanced at the map to roughly determine his current position, and finally, with Nana's help, staggered towards the place he had in mind.

……

Due to his knee injury, Sora's speed slowed down a lot, and several times he felt that he would be caught up in the next moment, so he was so frightened that he hurriedly threw the flashbang given by his father behind him before leaving. He remembered that the Great Steel Serpent had very good eyes and could see clearly in the dark underground, and flashbangs were perfect for it. However, he also knew that this level of attack would not make the Great Steel Snake give up the pursuit, but would only make it more furious.

Finally, Sora reached his destination, which was also a cave, but there were small streams gushing out of the rock wall, dripping to the ground. This is one of the places where Sora and Nana rested before.

"Phew—this is it. Nana, when you hear my order, use the [Shadow Ball] with all your might. Sora commanded as he gasped.

"Bah!" Eevee nodded solemnly.

Sora felt in his pocket, and there were still two special balls left, one was a flashbang, and the other was a shock bomb that he still didn't dare to use easily. According to my father, this special ball was picked up by him from the black market and was very powerful. However, Sora doesn't think it's needed now, and probably won't have a chance to use it in this life.

I went through the plan in my mind and found no obvious flaws. Sora silently admonished himself.

Chance, only once.

……

The hideous head of the great steel snake was the first to appear in front of the cave, and it had a certain sense of smell, which it had followed the empty bloodstains. The entrance to the cave is so narrow that only one person can pass through. But that doesn't stop it.

There was a loud bang, and the body as hard as a diamond crushed the rock at the entrance of the cave, bringing up a large cloud of smoke and dust, and the big steel snake crashed in with a thunderous force.

When the dust cleared, Sora looked at the giant beast in horror in front of him. The rocks wrapped around the body fell off one after another during the pursuit, revealing the shiny metal within. Blood-red eyes stared at this place, and Sora had no doubt that it would rush over and squash itself in the next second.

Scared?

Definitely. The large steel snake's huge, truck-like head reminded Sora of some unpleasant memories from his previous life.

"Whew-" Sora took a deep breath and suppressed all the distractions. Now is not the time to think about that.

"Nana, wagging your tail!"

Nana jumped in front of the air and flicked her big tail at the big steel snake.

The big steel snake that saw this scene not far away became even more angry, and its heavy body ploughed deep marks on the ground, and rushed towards the air devastated.

The fury of the Great Steel Serpent was expected in the air, and without the training of the trainer, the wild elves were easily provoked and lost their already little sanity. Unhurriedly, he threw the last flashbang while ordering Nana.

"Nana, take advantage of the moment, [Shadow Ball]!"

At the moment when Nana struggled to throw out the [Shadow Ball], the flashbang exploded in front of the big steel snake's eyes, and the dazzling light instantly illuminated the cave as if it were day.

Sora, with the goggles, narrowed his eyes as he watched the behemoth roll on the ground in pain.

The next moment, there was a "whooshing" sound of running water in the cave.

That's right! The target of [Shadow Ball] is not the Great Steel Snake at all, but the rock wall on the side. Corrosive energy crashed against the rock wall, enlarging the small outlet several times over.

Not enough!

Sora keenly noticed that even though the amount of water produced had increased a lot, this bit of water would not have much effect on the Great Steel Snake until it got rid of its vertigo.

No way. Sora took Nana, who was also a little dizzy, into his arms, and then clenched the last special ball in his hand.

Whether it can succeed or not depends on this!

Walk you!

As soon as the ball was shot, he hurriedly hugged Nana and ran towards the exit of the cave.

The shock bomb slashed through the air in a graceful arc and slammed into the rock wall of the flowing water.

"Boom-"

A huge sound and light came from behind the void, as if it were about to pierce his eardrums, and he felt only that the earth was shaking, the air was shaking, and the whole world was shaking.

After a long time, the "buzzing" sound in his head slowly subsided, and Sora looked at the falling earth and rocks around him, and suddenly realized.

I seem to have underestimated the power of the shock bomb in the cave.