For example, there was a pioneer union that offered thousands of souls to purchase all the Armored Scorpion meat in Klein's hands.

After being rejected, they even offered hundreds of runes.

Klein was almost tempted by such a generous offer.

However, Klein didn't lack these things at the moment. In addition, with his current strength, his efficiency in fighting these things was very high. On the contrary, the Armored Scorpion meat was very rare... Klein naturally wouldn't exchange these limited resources for unlimited resources.

There were still many groups like this. In the end, Klein was annoyed and directly blocked them. He also set up a private chat keyword. Only people with these materials could privately chat with Klein.

Time passed bit by bit. Under Klein's unscrupulous spending, many people were tempted.

Soon, Klein had gathered enough materials.

[Epic Giant's Heart: Soul 233/100, Rank 7 Blood and Gas Materials 3/3, Poison Dragon Ghost Gold 0/5, Frost Gem 3/3, Holy Light Egg 3/3, Flesh Above Rank 5 10/10, Soul of a Ferocious Beast Above Rank 5 10/10]

Looking at the synthesized list, Klein frowned.

It was easy to deal with the soul of a tier 5 crypt creature. All he needed to do was kill a few bosses. This wasn't a difficult task for Klein.

On the other hand, the Poison Dragon Ghost Gold left Klein at a loss for what to do.

In the end, after Klein gathered most of the materials and saw that there was no Poison Dragon Ghost Gold, he increased the price again, but there was still no news of the Poison Dragon Ghost Gold.

This made him doubt whether the Poison Dragon Ghost Gold existed or not.

However, this thought flashed through his mind.

The system naturally wouldn't require him to collect materials that didn't exist in the catacombs world.

If he couldn't collect it, it was very likely that it was a key ingredient for spirit beasts to advance, and he needed a special method to collect it.

However, the problem lay in the special method.

If Klein were to search for it himself, how long would it take?

And the advancement of the two spirit beasts was imminent.

Just as Klein was about to give up, a private chat window suddenly rang.

Klein took a glance and opened it.

A line of words appeared inside.

"I don't have the Poison Dragon Ghost Gold, but I have a way to obtain this Poison Dragon Ghost Gold."

"What way?"

Klein was delighted.

After a moment of silence, he said, "It's a map. The map says that there's a tier 8 Poison Dragon in a hidden space in the catacombs world. I suspect that there's something you need inside."

After reading the other party's words, Klein fell into deep thought.

Poison Dragon?

Tier 8?

Could it really be related to the Poison Dragon Ghost Gold?

However, there was no news of the Poison Dragon Ghost Gold in the catacombs world.

If he wanted to obtain the final materials, he could only take a gamble.

With this in mind, Klein replied.

"Where did you get this map?"

The other party quickly replied.

"I obtained it by killing a boss. This boss seems to be related to the Poison Dragon."

After seeing Klein, he nodded and didn't ask any more questions. No matter what, he had to go take a look.

With this in mind, Klein directly made a trade with the other party.

However, since the other party was just a piece of information, Klein only gave him half of the Armored Scorpion meat.

The other party didn't mind. Instead, he felt that he had profited.

After all, the map pointed to a tier 8 Poison Dragon. With his strength, it was unknown how long it would take him to challenge it.

Soon, the transaction was completed, and the map appeared in Klein's backpack.

With a thought, Klein took it out.

This was a map made of a special material.

It felt very delicate, and it also had a faint fragrance.

The map was very ancient, and most of the places couldn't be seen clearly.

There were only blurry lines and words that pointed to the final boss, the Poison Dragon.

However, it was very difficult to determine the exact location of the Poison Dragon with just this line.

Could he have been tricked?

Klein frowned.

Then, the system prompt suddenly appeared.

[This is an ancient scroll. Using it will give you a chance to challenge the Poison Dragon. Note, because this legendary coupon is seriously damaged, more than half of the elements have been lost. Therefore, it is only enough for you to challenge the Poison Dragon once. Please be careful.]

Looking at the system notification, Klein's eyes lit up.

'It's not a map, but a challenge coupon?'

'What a pleasant surprise!'

But Klein didn't use it now.

He still needed to make preparations. Although he had already challenged a tier 8 boss, he still had to be very careful. After all, once a creature had a relationship with a dragon, its strength would naturally not be weak.

Moreover, even though they were both tier 8 beasts, their strength would differ greatly due to their bloodline, skills, and weapons.

Most importantly, the level of a crypt creature wasn't the most important factor in determining the strength of a crypt creature. Instead, it was their talent.

For example, the underground tunneling of the Armored Scorpion, the invisibility of the Rogue Archer, the soundwave attack of the Harpy, and so on.

Without these troublesome abilities, these crypt creatures wouldn't pose much of a challenge to Klein. A single strike would be enough to kill them.

However, it was precisely because of these abilities that Klein had to be cautious.

Especially after experiencing so many life-and-death crises, Klein had to be fully prepared!

With this thought in mind, Klein began to examine himself.

The Endless Sword was already damaged, but it was still Klein's most powerful weapon.

The material was one thing, but more importantly, the attributes it had added.

Previously, the system had mentioned that runes could be used to recharge, but he didn't know how much it could recover.

But to him now, every point was very important.

As for attacking methods, Klein had basically given up on close combat.

This was because the physical strength of a boss at this stage was simply too powerful.

Although Klein had eaten many treasures that added attributes, his body's stats had already reached a terrifying level.

However, for crypt creatures, especially tier 8 crypt creatures, it was still not enough.

Therefore, Klein didn't plan on using his own body to test the attacks of crypt creatures!

Klein's main attack method now was the long-range grayish-black tornado.

The grayish-black tornado was the emasculated version of a half-step natural disaster tornado.

It could be cast instantaneously, and its power was equivalent to a Golden Spiral Shuriken.

In addition, the gray-black tornado had its own binding effect. Once it was hit, it could also increase the accuracy of its subsequent skills.