Both sides were very fast.

The slower creatures were left far behind.

But Klein still didn't choose to take action.

He continued pulling.

But the Poison Wind Fire Dragon Beasts were very fast.

Before long, three or four Poison Wind Fire Dragon Beasts had already arrived in front of Klein.

Klein didn't stop. With a flick of his finger, a Whirlwind spell whizzed past and instantly killed the Poison Wind Fire Dragon Beasts.

Soon, the chase was already very far away.

The large group could only see black shadows.

"This is my chance!"

Klein took in everything.

Then, he stopped in the sky and looked at the Poison Wind Fire Dragon Beasts that were rapidly pouncing at Klein.

Then, with a wave of his hand, the light from the Endless Sword whistled out.

In an instant, countless Poison Wind Fire Dragon Beasts were killed.

But to the massive Poison Wind Fire Dragon Beasts, these numbers were still nothing.

The gap created was quickly filled by the later Poison Wind Fire Dragon Beasts.

But Klein wasn't in a hurry.

Then, he picked up the Endless Sword again and injected a large amount of mana into it.

Soon, the Endless Sword, which had received a large amount of Klein's mana, underwent a change.

A tiny tornado gathered in the middle of the blade.

If one looked carefully, the color of the tornado was even darker than the previous one.

Furthermore, the might it exuded was even more terrifying than before.

Soon, it was fully accumulated.

The current tornado was already half the size of a house.

The terrifying speed made even Klein feel his heart palpitate.

That's right, this was the killing move that Klein had developed.

It was the advanced version of the tornado, the intermediate Whirlwind.

The intermediate tornado was a combination of the power of a half-step natural disaster and the time needed to accumulate the tornado.

A tornado at this level was very powerful, and it carried a hint of the threat of a half-step natural disaster.

This hint couldn't be underestimated.

With this hint of the threat of a half-step natural disaster, it gave the intermediate Whirlwind spell a hint of destruction.

Its power was dozens of times stronger than the low-level Whirlwind spell.

After accumulating the power, Klein gently waved his hand, and the intermediate Whirlwind spell whistled as it charged at the nearby Poison Wind Fire Dragon Beasts.

At this moment, the Poison Wind Fire Dragon Beasts didn't know that danger was approaching. They still frantically charged at Klein in an attempt to take down his head.

Therefore, the two sides met in the air.

There were no terrifying explosions, only countless scouring sounds that rang out among the countless Poison Wind Fire Dragon Beasts.

Following that, countless corpses of Poison Wind Fire Dragon Beasts fell from the sky.

Like cannonballs, they crashed to the ground with a rumble.

As for Klein's intermediate Whirlwind, he was like a god of death.

It had an extremely wide range and terrifying lethality. Not a single Poison Wind Fire Dragon Beast was able to break through its defenses alive.

This was a feast of slaughter.

It was also the most creatures Klein had encountered when he entered the catacombs world.

Similarly, due to the power of the intermediate Whirlwind, Klein also felt the thrill of instantly killing his enemies.

That was indeed the case.

Previously, Klein had faced bosses.

For example, the Blood Ape, the Stone of Destruction, and so on.

The weakest of them were at least at tier 6.

Furthermore, they possessed intelligence that was no less than a human's.

Furthermore, Klein had taken the initiative to attack, so it was naturally easy for him to be targeted.

Therefore, every battle was extremely difficult for Klein.

There had never been a battle like this where he instantly killed them.

As he looked at the endless corpses falling from the sky, he felt a chill run down his spine.

However, the intermediate Whirlwind was still not enough.

To completely destroy everything in this cave, a half-step natural disaster was the best choice.

However, casting a half-step natural disaster required a lot of time.

It also required a lot of magic.

Klein didn't want to use it easily.

After all, he hadn't seen the Poison Dragon until now.

If he had taken out his trump card earlier, he would be in a more passive position when dealing with the Poison Dragon.

Furthermore, a mage didn't have any mana, so how could he be called a mage?

Even if he had the divine artifact, the Endless Sword, he would probably only be able to use it as a hammer, right?

Alright, it wasn't a divine artifact right now.

Klein didn't stop.

It was very difficult to rely on an intermediate-level Whirlwind spell to kill a large group of Poison Wind Fire Dragon Beasts.

Therefore, Klein cast a few more intermediate-level Whirlwind spells.

Not only that, he also used the Explosive Speed of Rogue Archer's Half-High Boots to constantly pull and adjust his position to cast an intermediate-level Whirlwind spell, completely surrounding the group.

Soon, more than a dozen intermediate Whirlwind spells continued to charge in from the outside of Rogue Archer's Half-High Boots.

At every moment, a large number of Poison Wind Fire Dragon Beasts died miserably.

And the number of Poison Wind Fire Dragon Beasts was rapidly decreasing.

Seeing everything in front of him, Klein thought to himself, 'Looks like my strategy isn't wrong.'

'The system has informed me that creatures like the Poison Wind Fire Dragon Beasts typically have fast and have high attacks, but they have brittle skin.'

'If this brittle skin is combined with the creatures behind them, it will definitely bring them great trouble.'

'That's because the blood skin of those creatures is thicker! It provides a natural barrier for the Poison Wind Fire Dragon Beasts.'

With the Poison Wind Fire Dragon Beasts' momentum gone, Klein turned his head and looked down.

It wasn't just in the air. There were also many wild beasts on the ground.

And they were very fast.

If it wasn't for the fact that they couldn't fly...

Klein would probably have been completely surrounded by them by now.

But even so, Klein's danger hadn't been eliminated.

That was because the wild beasts below were beginning to pile up!

One, two, three, and soon, the wild beasts below were squashing and trampling on each other. Before long, small mountains appeared beneath Klein.

Although they were still very far away from Klein, they couldn't withstand the sheer number of the beasts.

Looking at the fearless charge of the beasts below, Klein estimated that it would take at most half an hour for the beasts to reach his position.

Although Klein could turn around and leave.

However, this was a hidden danger. Once he ran out of magic power and landed on the ground, it would be very difficult for him to deal with such an opponent.

Just as Klein was thinking of a solution.

At that moment, the system's notification appeared once again.

[Fallen Poison Marsh Fox, Corpse, Tier 5]

[Advantages: Fast movement speed, group formation, fearless of death.]

[Disadvantages: Unable to fly, low lethality, fragile body.]

Klein glanced at it.

He thought to himself, 'This is also a fast combat unit.'

'It's less troublesome for me. Since you guys came to me of your own accord, it's a good opportunity for me to wipe you out.'

'But what method should I use?'

Klein frowned.

The Whirlwind's lethality on the ground wasn't that great.

In addition, the units on the ground were more soulful than the units in the air.

And according to the system notification, these creatures were clearly gregarious animals.

Although they were dead bodies, their bloodline talent was still present. There might be a backup plan.

Therefore, it wasn't good to use the method to deal with the Poison Wind Fire Dragon Beast to kill them.

Just as Klein was thinking about how to attack...

His eyes suddenly lit up.