[Treasure Chest Monster Meat: Each Treasure Chest Monster meat has a very small amount, but each piece of meat is very elastic. It is the essence of the Treasure Chest Monster. If you consume it frequently, it will give you a mouth full of good teeth. Currently, it has a three-star satiation index. Overall score: 66]

[Treasure Chest Monster Blood: It is filled with the smell of rust and has no nutritional value. It is combustible and can ignite at a single point. The temperature of the flames is extremely high.]

Klein looked through the details and kept the flesh of the treasure chest monster away.

Next, he opened the real iron treasure chest.

[System notification: Iron Treasure Chest+1]

[System notification: Excellent Gas Mask Blueprint+1]

[System notification: Map (Medium-Sized)+1]

[System notification: Perfect Sand Fishing Device Blueprint+1]

[System notification: Wind Rune+1]

"Fishing machine?"

Klein couldn't understand how to fish in the catacombs world.

Could there be fish beneath the soil?

He hadn't encountered any in the past few days of digging.

He thought for a moment before saying, "Two manufacturing blueprints and a medium-sized map. It's not a loss to open the chest this time."

Klein muttered to himself.

There was naturally no need to elaborate on the medium-sized map. He could check the notes for the next five catacomb caverns and plan the route ahead of time.

The other two blueprints...

[Excellent Gas Mask: It is a daily rune device. It can guard against most poisonous gas and provide the wearer with purified air. The size can be customized.]

[Perfect Sand Fishing Device: A daily rune device. Add a little bait, bury it under the sand, and it's easy to catch Sand Fish.]

Both devices have good uses.

With the gas mask, he would able to access some of the gas chambers.

Not to mention the fishing machine did not need to operated. It could just be buried in the ground and could fish itself..

He just didn't know if Sand Fish tasted good!

"Learn it," Klein recited.

Two blueprints disappeared.

Open the manufacturing list.

[Excellent Gas Mask: Wind Rune 2/1, Animal Skin 11/1, Iron 81/2, Silver 7/1, Crystal 6/1]

[Perfect Sand Fishing Device: Earth Rune 2/2, Iron 81/10, Copper 67/10]

The materials for the two runic devices were sufficient.

Klein didn't plan on forging them for the time being.

He would talk about it when he needed it.

"Medium-sized map! This is good stuff."

Klein spread out a piece of parchment.

He had obtained it the last time he looted a corpse.

The middle of the map was marked with a red dot, which was the catacomb he was currently in.

After eliminating the previous catacomb, there were only five directions left...

Klein directly looked for the special item marked on the map.

Runic Egg.

Silver Treasure Chest.

An abandoned Earth Dragon nest.

Klein quickly locked onto three locations and planned out a route.

First, he had to enter the poison chamber below.

Then, he had to dig to the left to obtain a runic egg.

He continued to head to the left catacomb, and if he continued digging, he would find a silver treasure chest.

The last stop was the abandoned lair of the Earth Dragon!

Klein lowered his head to look at the hint.

"I'll choose this route. If there's any danger, I'll just change my route. It's not bad to turn into this catacomb in the middle. There's an iron treasure chest."

"The first stop is the poison gas chamber. The gas mask has to be forged."

Klein looked at Little Fox.

She also needed a gas mask!

Thankfully, this thing could be customized, or Little Fox wouldn't be able to pass through the gas chamber.

"I'll make one for myself first."

Klein opened the production list again.

He selected the gas mask.

He confirmed the production.

[System notification: Wind Rune-1, Sand-Eating Beast Skin-1, Iron-2, Silver-1, Crystal-1]

[System notification : Excellent Gas Mask has been successfully forged.]

A mask appeared in Klein's hand that could cover the entire face.

It was made of iron, and the eyes were two transparent lenses.

The mouth and nose of the mask protruded.

There was a pattern of wind at the breathing area.

Klein put on the gas mask. It was just the right size and could breathe normally.

"I'll forge another one for Little Fox."

When Klein made the second gas mask, he chose the target to be the little fox.

After using the same materials, the second mask appeared.

The two gas masks had different styles.

The one for the Little Fox was more protruding, like a dog muzzle.

"Little Fox, give it a try."

Klein squatted down and put it on Little Fox.

Little Fox widened her eyes.

"Can you breathe?" Klein asked.

Little Fox nodded.

"It's quite strong. Don't take it off later."

Klein reminded her and took out the shovel.

Before digging, he checked the prompts as usual.

[Dig down. You will be enveloped by the poisonous miasma. It won't cause any harm to you. You will be able to find a Copper Treasure Chest and some resources.]

After Klein confirmed it, he began digging down.

The tunnel continued to extend downwards.

Little Fox squatted on Klein's shoulder.

She wanted to help with the digging.

However, her efficiency was far inferior to a shovel, and it was easy to be a hindrance.

About twenty-five meters down, a black membrane appeared.

Klein directly jumped down.

His body fell rapidly.

In midair, the floating propeller at Klein's waist spewed out gas.

Suspended in midair, he had already noticed the differences in this cavern.

In the air, there was a lot of grayish-white gas.

This was the miasma!