[The left cavern is filled with poisonous gas. Please prepare a gas mask, or you will die if you enter.]

[Continue digging forward, there are scarlet flying insects are waiting for you. There is a high chance that you won't be able to defeat them.]

[In the cavern above, there are three anesthetized bats. If you are bitten, you will fall asleep.]

[In the right cavern, there is a sleeping crypt creature, but your short spear proficiency is not high enough.]

[Below, it's better not to dig. You'll definitely die.]

Apart from the rear, the five directions were dangerous.

And it was extremely large.

Klein suddenly hesitated.

"Which side should I choose?"

It definitely wouldn't work from the bottom left.

There were three left...

There are too many scarlet flying insects. It wouldn't work.

Up, or right.

Klein looked up.

It was four meters tall.

If he relied on the sand to constantly raise his height, he could climb up.

But the final step was very difficult.

When he climbed up, if there was any movement, the three anesthetized bats would pounce on him. If he was stuck at the entrance of the cave, he would be gone.

He was too passive!

From the looks of it, only the right side was feasible.

Klein clenched his short spear and took a deep breath.

Should I kill my way out now?

Of course not.

After some thought, he said, "The hint told me that I don't have enough proficiency. Perhaps, when I have enough proficiency, I can kill my way out! Next, I should practice well and not dig any further."

Klein had another thought.

Crypt creatures should at least eat.

Would they temporarily leave the catacombs?

He stopped to observe for a moment.

Klein tried stabbing a few times with the short spear.

He had already summoned the runic base and was hiding inside to practice. Although the space was small, it was very safe.

If a clumsy crypt creature came out of nowhere and was caught off guard, it would be easy for something to happen.

800, 900, 1,000 times..

Klein kept practicing,

When he was tired, he rested for a while and drank some water.

Soon, there were only two and a half bottles left of the three bottles of mineral water.

It was time for rest, and he had nothing to do.

Klein turned on the chat channel.

After circling around for a while, he discovered that many people were asking for water and food.

Five or six hours had passed since everyone entered the catacombs.

Klein had dug to the fifth catacombs, while most of the others stayed at the second or third catacombs.

Some were injured, while others were lucky enough to dig up something good.

Similarly, there were already people who had died!

Each regional channel had a total of 1,000 people at the start of the game.

At that moment, all of them had their numbers reduced.

There were 937 players left in Klein's regional channel.

This was undoubtedly a form of hidden pressure.

Choose carefully, or people will really die!

When someone dug a second catacomb, they could muster up their courage.

When they were about to dig a third catacomb and saw someone die, they immediately wilted.

"My progress is considered fast."

"If nothing unexpected happens, from the first catacomb to the second catacomb, no one will die. If they're lucky, they'll be able to dig up something good."

"Starting from the third catacomb, the risk will gradually increase."

Klein fell into deep thought.

He logged out of the chat channel and entered the trading platform.

There were people who began trading and bartering.

"So many people are short of water?"

Klein browsed through them and found that they were all asking for food and water.

After all, survival materials were currently the most scarce and most important.

"No one is trading runes."

He thought for a moment and said, "Break down a bottle of mineral water."

He was prepared to throw 400ml of water to the market later, only exchanging for water runes and fire runes.

The other items could be traded, but the plastic bottle had to be kept.

How the trader drank it had nothing to do with him.

[System notification: Water+400ml]

[System notification: Plastic Bottle+1]

In the trading channel.

[Seller: Klein 182.56]

[Item: 400ml Mineral Water]

[Requirements: 1 Water Rune]

[Pptions: 1 Fire Rune]

[Inventory: 1]

Just as Klein put the item up, the chat channel immediately exploded.

"F**k, someone is trading with water."

"What's a rune? If anyone trades with him, I'll trade with you."

"Water is a scarce resource. I haven't seen a drop of it in the trading market today, yet someone is willing to trade with it!"

"Gan, that retard is spouting nonsense on the world channel? I want to trade with Big Brother Klein in private."

There was a heated discussion over here.

On the other side, a bunch of people were privately chatting with Klein through the trade channel.

"Brother Wei, can I exchange 100 units of sand for your water?"

"Brother, do you want to trade with me? I can satisfy any of your requirements!"

Someone smiled and said, "I'm a billionaire. Give me the water. I'll give you ten billion when we get out!"

Someone then asked, "Big brother, do you want iron? I want the water!"

"..."

Not a single person had water or fire runes.

Among the tens of thousands of private messages, there were some foreigners' avatars. However, the messages they sent to Klein were in Chinese.

Probably, the system could automatically translate them.

Among these people, there were some celebrities that Klein was familiar with, and even rich people and officials.

Some begged Klein, some threatened him, some promised him rewards, and some seduced him with their beauty.

Klein ignored all of them.

In front of Klein, everyone in this world was equal.

Without runes, there was no way they could be exchanged!

God knew if they would be able to return to the real world alive.

After resting for twenty minutes, no one traded.

Klein got up and continued practicing his short spear.

Hard work always paid off.

Now, Klein's proficiency with his short spear had increased by a lot.

A few hours later, the light in the catacombs dimmed.

There was only a quarter of a bottle of mineral water left.

He had also eaten a loaf of bread.

At that moment, Klein checked the catacombs on the right again. There was a change in the notification.

[In the cave on the right, the crypt creature has woken up. Don't startle it. Wait for daybreak and end it with your short spear.]

The notification revealed two pieces of information.

1. The crypt creature had woken up.

2. It no longer mentioned the proficiency of the short spear.

Perhaps, Klein's proficiency had reached the requirements!