The 71st catacomb!

Before entering, a hint appeared in front of Klein's eyes.

[In this catacomb, you will encounter some Stone Beetles. These guys are very clever. They will disguise themselves as rocks, and it will be completely undetectable. But once you get close to them, they will immediately reveal their original appearance and eat you! They have resistance to water, fire, and lightning. It's very difficult to kill them, so you can only think of a way to drag them in.]

[Of course, these Stone Beetles have very hard shells. Ordinary weapons are completely unable to do anything to them. Even sharp swords will often break into two when they touch them. Don't clash head-on with them.]

Klein chose to enter the catacomb precisely because they had hard shells.

And Klein wanted to test the sharpness of the Golden Firestorm Saber in his hand.

After entering the catacomb, Klein saw a few stones placed not far away.

These stones were of different sizes and looked no different from ordinary stones from afar.

Klein thought for a moment and said, "These guys should be Stone Beetles. They should be disguising themselves and waiting for me to take the bait."

Klein smiled calmly and let Little Fox and Little Wind wait by the side. They also helped him keep watch.

He took out his Golden Firestorm Saber and skillfully twirled it around in his hand as he walked towards the group of Stone Beetles.

"Come, let me see just how hard you are."

Klein spoke to the group of Stone Beetles in the common underground language.

There was a playful look on his face.

However, before using the Firestorm Saber, Klein first threw a few fire elemental missiles at them.

Boom! Boom! Boom!

Three fire elemental missiles rapidly smashed towards the group of Stone Beetles.

After a series of explosions, thick smoke rose into the air.

The thick smoke dispersed, but the Stone Beetles remained unharmed.

Furthermore, it didn't move at all.

"Heh heh, as expected of a Stone Beetle that claims to have absolute defense."

Klein smiled slightly.

"And it's indeed very calm. This is even better than the Golden Sand Dragon."

When Klein had used the fire elemental missile on the Golden Sand Dragon, the other party couldn't tolerate it at all. It was so furious that it had to rush out and kill Klein.

However, the Stone Beetles were different. They didn't react at all!

Klein was in the mood.

He snapped his fingers a few more times with his right hand.

The fire elemental missiles bombarded the group of Stone Beetles.

He bombarded them for dozens of minutes!

By the time Klein's left hand was starting to ache, the Stone Beetles still didn't react.

Furthermore, they were completely unharmed.

"The test is complete. Be it patience or defense, they are all top-notch."

Klein licked his lips and said, "However, this is also just right. An opponent at this level will allow me to better test the true strength of the Golden Firestorm Saber in my hand."

The Firestorm Saber in his hand instantly stabbed at a larger Stone Beetle.

Bam!

The loud sound of the collision reverberated throughout the entire cave.

Klein felt a powerful feedback force from his right hand.

Thankfully, Klein's physique was much stronger than before.

Klein could easily withstand this strength.

He took a few steps back.

Klein observed.

There was a crack on the Stone Beetle's surface!

However, it wasn't deep.

It was only a few centimeters.

But it was enough to prove that the hardness of the Golden Firestorm Saber was above that of the Stone Beetles!

"Still not moving?"

Klein frowned.

These fellows were really too tolerant.

If Klein hadn't received the hint, he might have really let down his guard.

These fellows were many times more patient than the Golden Sand Dragons.

Klein smiled and said, "Since you guys are so resilient, why don't you try this move?"

As soon as Klein said that, the Firestorm Saber in his hand instantly burst into flames!

Flames were ineffective against the Stone Beetles.

However, coupled with the unique characteristics of the Golden Firestorm Saber, the intense flames could not only add the effect of flames, but it could also increase the 'hardness' of the Firestorm Saber.

That was to say, its lethality!

In the catacomb, the flames ignited.

The temperature instantly radiated the surroundings.

The intense flames lit up the dark parts.

Amidst the flames, Klein's eyes revealed an intense killing intent.

Suddenly, the stone that had been motionless suddenly opened its eyes.

Following that, its hands and feet extended out.

They looked at Klein with eyes filled with anger.

"You finally can't take it anymore? Hmph."

Klein sneered.

He charged at the Stone Beetle.

He slashed down.

Tss!

The Stone Beetles quickly dodged and dodged the fatal blow.

However, it was still corroded by the saber light.

A deep wound was instantly left on its surface!

"If I hit it completely, I should be able to cut it in half," Klein analyzed.

At the same time, he focused his mind and charged at the Stone Beetle again.

The other Stone Beetles didn't seem to have any intention of helping the Stone Beetle.

That was because they could no longer protect themselves.

The dancing flames attached themselves to the Golden Firestorm Saber, causing them to feel immense fear.

The anger in the Stone Beetle's eyes had completely disappeared.

In exchange, it was filled with deep fear.

Faced with Klein's second attack, it instinctively wanted to dodge.

However, Klein fired a few fire elemental missiles in advance.

They hit the ground near the Stone Beetle, causing thick smoke to billow!

It blocked the Stone Beetle's line of sight.

The Stone Beetle couldn't see Klein's position clearly in the thick smoke.

It was instantly flustered.

At that moment, it suddenly felt its body being gently slashed by something.

Immediately following that, its body was split into two.

Before it could feel the pain, it was already dead.

Its entire body had been cut in half!

"One was taken care of."

This result was much easier than Klein had thought.

This also proved the power of the Golden Firestorm Saber.

The other Stone Beetles were so frightened that they fled in all directions.

But Klein caught up to them one after another.

One by one, all of them were cut in half.

[System notification: Corpse decomposition]

[System notification: Stone+50]

[System notification: Fire Rune+20]

[System notification: Water Rune+20]

[System notification: Earth Rune+20]

[System notification: Wind Rune+20]

...

[Stone Armor Ironstone: A very hard material that can be used to forge weapons. It's much harder than weapons made of ordinary iron! Those weapons are like mud being cut by the collision of Stone Armor Ironstone weapons.]

This thing was of no use to Klein, but he could customize weapons suitable for Little Fox and Little Wind.

No matter how sharp Little Fox's claws were, they couldn't compare to the stone armor.

Little Wind didn't need to be mentioned. It was the same.

As for the remaining materials, Klein planned to put them up for trade.

However, he would deal with them later.

Klein had something he was more concerned about.

"Open the runic base!"

He wanted to see how the Water Elemental Grass was doing.