At this moment, Klein didn't notice this.

That was because there was simply too much poison fog around him.

In a short moment, he couldn't even see his own fingers.

It was impossible to dispel it in a short period of time.

There was nothing he could do.

Klein could only retreat rapidly.

Of course, it wasn't that Klein was unable to deal with the poison fog.

It was that Klein didn't want to alert the enemy.

Most importantly, the Poison Dragon was in the dark, and he was in the light. He had to be extremely careful.

But just as he raised his head, he suddenly saw a huge eye amidst the endless poisonous fog.

Instantly, Klein felt a chill down his back, his scalp tingling, and his temples trembling violently.

'Damn it!' Klein screamed inwardly and retreated explosively again.

He didn't expect to arrive at this place unknowingly.

Thankfully, the other party didn't launch an attack. Otherwise, if he was caught off guard, it was very likely that he would lose the initiative.

But as it watched Klein retreat explosively, the Poison Dragon in the fog didn't make any movements.

It was very quiet.

However, its huge eyes stared coldly at Klein's back.

Klein flew extremely far away and only stopped when he realized that he could no longer sense the other party's aura.

"What on Earth is that?"

Klein heaved a heavy sigh of relief, but when he thought of that gigantic eye, he couldn't help but feel his scalp tingle.

There was nothing he could do!

That eye was too gigantic.

In front of it, Klein was like a child.

'Could that be the Poison Dragon?' Klein thought.

'If that's the case, the terrifying Poison Dragon is definitely not simple! But why didn't it attack when it discovered me?'

'Could there be something wrong with it?'

At that moment, the system's notification appeared.

[Sealed Poison Dragon, Ophelius Poison Dragon]

[Rank: Tier 8 (Peak)]

[Attribute: Poison]

[Skills: Poison Chain, Chaos Poison Rain, Summon Poison Earth Dragon...]

Looking at the system notification, Klein frowned.

'As expected!'

'It's a Poison Dragon!'

'But what does it mean to be sealed?'

'Isn't it a crypt creature that guards this world?'

Klein thought for a moment, but he couldn't figure it out.

But now that he had found the Poison Dragon, there was no need to be careful.

With this thought in mind, Klein took out the Endless Sword.

Then, he cast a Vacuum Strike.

As Klein's magic condensed, Klein slashed wildly at the mountaintop.

Countless Vacuum Strikes flew at the Poison Dragon.

The sharp Vacuum Strike even cut through the fog.

Then, it penetrated deep into the ground, producing rumbling sounds.

'Did I hit it?' Klein thought to himself.

But what answered him was a terrifying spell.

Instantly, Klein felt that he had been locked onto by something.

"Not good!"

An ominous feeling filled Klein's heart.

He wasn't unfamiliar with this feeling.

That was because this was the state he was in when he was locked onto by the spell.

Then, Klein didn't dare to be careless. He picked up the Endless Sword and turned around, wanting to escape.

But he was done for.

The ripples of magic finally took shape.

A hundred meters in the air above Klein, a huge dark cloud was silently forming.

The dark cloud wasn't black, but green.

Within the green poisonous cloud, there seemed to be something alive that was constantly stirring inside.

Before long, the poisonous rain finished accumulating and instantly fell down, covering all the space that Klein had to dodge.

At that moment, Klein also felt the airflow above his head.

Then, he hurriedly looked up.

He saw the formed poison rain cover the sky and land, covering him.

'This is the Chaos Poison Rain?' Klein thought to himself.

But he didn't dare to be careless.

After all, the opponent was a monster at the peak of the tier 8.

Its strength was two ranks higher than Klein's.

Klein naturally knew how terrifying magic was.

With this in mind, Klein picked up the Endless Sword.

He faced the sky and slashed with his saber. A long and narrow Vacuum Strike whizzed forward.

Slash--

It was as though lightning had appeared in the sky.

The powerful Vacuum Strike brought with it endless air currents as it swept upwards frantically.

Finally, the two sides met.

At the instant of their meeting.

The saber beam cut through all the rainwater.

The fish that escaped the net was also blasted away by the air pressure within.

Following that, the Vacuum Strike plunged into the poisonous cloud with the greatest power it had accumulated.

Rumble...

Explosions sounded from within.

Soon, Klein felt the lock on his body disappear.

The poisonous cloud above his head also disappeared at a speed visible to the naked eye.

However, his crisis wasn't over yet.

For some reason...

Klein felt an even stronger sense of danger approaching him.

As expected!

Whoosh--

A green poisonous lightning bolt was charging at him at a terrifying speed.

"This is the Poison Dragon's Poison Chain?"

The Poison Chain wasn't one, but countless chains that were combined to form a few meters in length and width.

Wherever it passed, even space seemed to be unable to withstand the high temperature, emitting plumes of burning green smoke.

He sensed the fluctuations within.

Klein had no doubt that once he was hit, even with his tier 8 body, he wouldn't be able to withstand a second and would be completely penetrated.

'I can't be careless!'

Klein cast his magic skill, the Power of the Wind.

Then, he raised the Endless Sword high, and countless spells crazily covered the Endless Sword.

Before long, a gigantic saber glow formed on the Endless Sword.

After the saber glow was formed, Klein once again used a Vacuum Strike.

In an instant, a Vacuum Strike that was more than ten meters high charged at the Poison Chain.

The speed of the Vacuum Strike was very fast.

In addition, Klein used the Power of the Wind to strengthen it.

Therefore, he hit the Poison Chain in an instant.

Rumble--

The two collided, creating a huge tremor.

But to Klein's surprise, the terrifying Vacuum Strike didn't shatter the Poison Chain immediately. Instead, it was in a stalemate.

But clearly, the power of the Poison Chain was even greater.

Before long, the Vacuum Strike was beaten back.

'No!' Klein thought to himself.

Once the Vacuum Strike was knocked down, he would be in trouble.

Therefore, he couldn't care less and used the Vacuum Strike again.

He used three in a row, instantly resisting the decline and sending the poison fragments flying.

The Poison Chain that was sent flying smashed into the ground, producing a rumbling sound.

The entire poison lake was also smashed by the terrifying explosion, creating a bottomless hole.

Klein's Vacuum Strike also smashed viciously at the Poison Dragon.

But just like before, there was no sound.

This made Klein frown.

Then, he thought to himself, 'I want to see just what you look like.'

With that said, Klein raised his endless blades and cast an intermediate Whirlwind.

It whistled as it swept towards the Poison Dragon.