In the next few days, Klein wasn't in a hurry to leave the catacombs.

Instead, he continued training Little Fox and Little Wind.

Klein knew very well that he didn't care about this little bit of time. After all, if he could raise the strength of Little Fox and Little Wind by a level, then it would save Klein a lot of time in the future.

Therefore, he had to spend this time.

Furthermore, in just a few days, Little Fox's speed and stamina had improved tremendously.

Previously, when Little Fox ran back and forth in the catacomb caverns, one could still see white light. Now, you could only hear sounds.

It was so fast that you couldn't even see a shadow!

This all meant that the training over the past few days had been very effective.

This also gave Klein a lot of confidence.

This meant that his training method was completely correct.

All Klein needed to do next was to continue using this training method.

That way, Little Fox and Little Wind would definitely be able to continue improving.

And other than Little Fox, Little Wind's improvement was undoubtedly very obvious.

Now, it only needed one strike to smash the hardest rock in the catacomb into smithereens.

This was something that Little Wind could never do before.

Seeing his improvement, Little Wind was overjoyed.

There was a hint of pride in his expression.

He just looked at Klein, hoping that Klein would praise him.

Klein walked over and squatted down, stroking Little Wind's head once again.

"Well done, Little Wind. Keep up the good work. You can still become stronger."

At the same time, Little Fox instantly appeared in front of Klein.

"So fast. I couldn't react at all."

Klein was stunned for a moment, even though it wasn't the first time Little Fox had appeared in front of him at such a fast speed, Klein still couldn't react.

This made Klein unable to hold back his joy as he smiled and patted Little Fox's head.

"Little Fox is also very good. Heh Heh, continue working hard. Next, what you need to do is to lower the sound you make when you move."

Little Fox's speed and stamina were much better than a few days ago.

Of course, she hadn't reached its limit yet.

She still needed to continue training in these two areas and constantly break through the limit.

However, during the past few days of training, Klein also noticed another point.

That was that Little Fox's sound was very obvious when she moved.

This was a huge flaw when facing an enemy.

Your speed was very fast, making it impossible for others to see clearly.

With the increase in stamina, it would be difficult for the other party to gain an advantage in a prolonged battle.

However, if the sound was very loud, although the other party couldn't see you, they could still use their hearing to track you.

That way, they would still be caught in a bitter battle.

Therefore, what Klein needed Little Fox to do was to hide her sounds.

The genes of crypt creatures were much higher than those of the world Klein was in.

Furthermore, Little Fox and Little Wind were carefully nurtured by Klein.

They were even better than most crypt creatures.

Therefore, it wasn't impossible for Little Fox to conceal her sounds and do her best to move silently.

Klein smiled and said, "Little Fox, as long as you can move silently and at high speed, I'll reward you with twice the amount of barbecued meat."

Little Fox's eyes widened when she heard that.

Twice the amount of barbecued meat!

It could be said that Little Fox had been eating barbecued meat every day for the past few days.

Therefore, even though it was very hard to train normally...

But when Little Fox thought about having barbecued meat to eat, her heart was instantly filled with endless fighting spirit.

Now, having twice the amount of barbecued meat was a fatal temptation for Little Fox!

How could Little Fox let go of this opportunity to eat twice the amount of barbecued meat?!

Naturally, she had to train hard and follow the instructions of her master to maintain her high speed and silence.

Little Fox didn't rest and immediately began training.

However, in order to move silently, she naturally had to slow down.

Little Fox began testing again and again.

However, there was still sounds.

However, it was much smaller.

Little Fox wasn't discouraged. She knew that it was impossible to succeed in a short period of time.

She could only persevere.

Klein felt very gratified when he saw this scene.

Meanwhile, Little Wind walked in front of Klein.

His gaze was very determined.

"Are you trying to improve yourself in other areas?"

Klein looked at Little Wind's gaze and guessed.

Little Wind instantly nodded.

Klein was delighted, but he immediately began to think carefully.

Little Wind was a pangolin.

Wait, a pangolin!

Was the pangolin's function to drill underground tunnels and gather information?

With this in mind, Klein instantly had an idea.

"Little Wind, try digging a tunnel. The first thing is to increase your speed. The second thing is to increase your ability to gather information."

In this catacombs world, he could encounter enemies at any time.

Then, gathering information was very important.

Although Klein could have hints, hints weren't omnipotent.

At this point in time, it would undoubtedly be more beneficial to Klein if he could get Little Wind to gather more information.

With this in mind, Klein told Little Wind about the idea.

Little Wind nodded and began developing his new ability.

However, Klein wasn't stingy with Little Wind.

It was also twice the amount of roasted meat.