Isekai Adventure in the Dimensional Cube

In the depths of the forest, there was a clearing.

At dawn, this once-deserted spot welcomed uninvited guests who had caused a commotion just the day before.

"Click, click..."

Controlled by Kotetsu, Model Yoriichi Zero slowly entered the clearing and stood still, like a samurai awaiting his lord's command.

Tanjirou and Kotetsu had arrived early, waiting for Reiger's arrival.

"Hasn't he arrived yet?"

Kotetsu looked eagerly towards the other end of the forest path, as if anticipating Reiger's appearance.

"It probably won't be that quick, right?" Tanjirou, his sword ready for battle, saw Kotetsu's impatience and hurriedly said, "The morning is when my elder brother and the pillars have their combat training. Perhaps elder brother will come after the training ends, which means in the afternoon."

"The afternoon?" Kotetsu couldn't hide his disappointment. "That long?"

No sooner had he spoken than Tanjirou's nose twitched slightly, and he looked astonished towards the end of the path.

"It seems elder brother is coming."

Tanjirou had detected Reiger's scent.

"Really?"

Kotetsu instantly perked up.

Then, the two of them saw, at the other end of the path, Reiger slowly making his way here.

He indeed had come.

Before starting his combat training with the pillars, Reiger had first made a trip here.

However, it wasn't just Reiger who arrived, but also a figure following close behind him, like an attendant.

This figure made both Tanjirou and Kotetsu show expressions of astonishment.

"Model... Yoriichi Zero...!?"

Kotetsu exclaimed in surprise.

"Tsukiguni Yoriichi..."

Tanjirou was staring at the figure, uttering this name.

Of course, Tanjirou was not referring to Reiger, but to the swordsman who had deep ties with his ancestor, the one who left the legacy of the Breath of the Sun and Sun Wheel Earrings in his family—Tsukiguni Yoriichi.

Right beside Reiger walked a swordsman, who looked similar to Model Yoriichi Zero yet lacked the mechanical aura and appeared almost lifelike.

"Sorry to keep you waiting."

Reiger arrived in front of the wide-eyed Tanjirou and Kotetsu and greeted them with a smile.

Clearly, Reiger was in a good mood.

However, whether it was Tanjirou or Kotetsu, their attention was completely captured by the figure beside Reiger; they didn't even notice his unusually good mood.

"What is going on?"

Kotetsu was confused.

"Big brother?"

Tanjirou also looked at Reiger, then back at the figure resembling Model Yoriichi Zero, his eyes filled with suspicion.

"It's called Model I," Reiger said smiling at the bewildered Tanjirou and Kotetsu. "Since the original model is called Zero, I named this one Model I. What do you think? Is the completion rate satisfactory?"

What did those words mean? How could Tanjirou and Kotetsu not understand?

"Is he also an automaton?"

Tanjirou's astonishment deepened.

"Impossible!"

Kotetsu jumped up in disbelief.

It was unavoidable.

"You've created an automaton? Made a second Model Yoriichi Zero? That's impossible!" Kotetsu shouted repeatedly. "Even if you've mastered the technology of the ancestor, you couldn't have created a second Model Yoriichi Zero overnight!"

Kotetsu then leaped towards Model I and started feeling its surface.

With this touch, Kotetsu realized there were many differences between Model I and Model Zero.

First, its outer material was distinctly different from Model Zero's, lacking a wooden texture and feeling more like cold, hard steel.

Secondly, unlike Model Zero, which had six arms and six swords, Model I only had two arms and two swords.

The human-like appearance of Model I was also high, at first glance completely resembling a human, unlike Model Zero, whose face and joints clearly showed the lines and joints of a puppet.

The appearance of Model I was exactly the same as Tsukiguni Yoriichi whom Reiger had seen in his dreams, the only difference being that Tsukiguni Yoriichi had one sword, while Model I had two.

Due to the material enhancements and improved performance made by Reiger, Model I, unlike Model Zero which required six arms and six swords to replicated Tsukiguni Yoriichi's movements, didn't need to have six arms installed; however, it still required two swords to replicate Tsukiguni Yoriichi's sword techniques.

Therefore, although Model I's performance had improved, its combat power hadn't increased much, only going from barely entering Level 4 to the mid-range of Level 4.

This combat power, although not inferior to the core swordsman among the nine pillars such as Rengoku Kyoujurou, Shinazugawa Sanemi, Uzui Tengen, Iguro Obanai, and Tomioka Giyuu before they activated their marks, and even stronger than Tokitou Muichirou, Kochou Shinobu, and Kanroji Mitsuri before their marks, still fell short of the upper echelon demons.

However, because of the change in material, Model I's entire body inside and out was made of metal, making its defensive power and resistance to strikes far higher than its combat level by a whole tier.

That is to say, the Type One model, modified and born from Reiger's hand, was equivalent to Lv.4 in combat, yet specialized in "Durability."

Speaking of "Durability" alone, the Type One could reach Lv.5. Ordinary Lv.4s, even if could contend with it, would not be able to leave even a scratch on its shell.

Similar entities existed in the underground city of Earth Mistake World.

That was the floor master of the 17th level, the gigantic Goliath.

Goliath was categorized as a Lv.4 monster specialized in "Durability." Its skin was so tough that without a Lv.5 first-class adventurer or special weapons of the second tier or above, its defense was simply impenetrable.

Type One belonged to the same category, tendency, and even the same class as that floor master, just a mechanical doll whose size was not as large.

However, not being as large as Goliath, Type One's speed and agility were much better, which was not a bad thing.

This was the mechanical doll that Reiger handcrafted, based on Tsukiguni Yoriichi Model Zero with some improvements, hence birthing this being.

"Impossible... this is impossible..."

Kochou Shinobu felt as if all her beliefs were shattered.

The finest mechanical doll, crafted by her ancestors with a lifetime of effort, had been replicated and even improved upon by someone else in just one night?

This was not an easy fact to accept!

"Here you go." Reiger then returned the ancient book to Kochou Shinobu, saying, "It was very helpful to me."

Kochou Shinobu looked bewilderedly at Reiger as he handed her the book, and after a moment, she reached out to take it.

"Can this also be used for training, big brother?"

Tanjirou didn't have complex feelings like Kochou Shinobu did; he had already accepted that Reiger had crafted another mechanical doll and was quite eager as he looked at Type One, who appeared no different from a human Samurai.

"It's not just for training, it can even be deployed on the battlefield to fight demons," Reiger explained. "Don't rush me; let me fix the Zero Model first."

Hearing this, Kochou Shinobu's spirit lifted again.

"Can it be fixed?"

She asked hurriedly.

"No problem," Reiger smiled at Kochou Shinobu and said. "I can even modify it if you need, do you want that?"

Now that Reiger could create a Type One with higher performance than the Zero Model with magic, he naturally could also remodify the Zero Model to possess the same capabilities as Type One.

"No, that won't be necessary," Kochou Shinobu shook her head and said, "Just fixing it will be fine."

Kochou Shinobu was actually somewhat afraid that the Zero Model would be modified by Reiger into a form she completely didn't recognize.

That was, after all, a relic left by her ancestors, the greatest masterpiece of her family.

So, rather than using the Zero Model as a combat mechanical doll, Kochou Shinobu saw it more as a spiritual support, a symbol of her family.

If it were just some improvements, that would be one thing, but the modifications Reiger was considering were almost like creating another mechanical doll altogether, which frighted Kochou Shinobu.

Thus, Kochou Shinobu declined the offer.

"Fine," Reiger didn't insist and said, "Then I'll just fix it."

"Is there anything I need to do?" Kochou Shinobu asked, "My family has tools and a workshop, you can use them if you need."

"No, there's no need," Reiger shook his head and said, "I can do it here, just wait for me."

Saying this, Reiger walked towards the clearing and approached the Zero Model.

Type One followed immediately, like an emotionless attendant.

This was yet another thing that shattered all of Kochou Shinobu's beliefs.

As one should know, mechanical dolls are just dolls; if there are no specific operations, mechanical dolls won't take any action.

But Type One was different; it didn't need Reiger to operate it, nor did it need any buttons pressed or switches turned. It would stop when Reiger stopped, and walk when Reiger walked, acting almost as if it had its own consciousness.

"Is this a mechanical doll crafted by the master of the divine blade...?"

Kochou Shinobu began to understand why those normally arrogant swordsmiths in her village acted so fervently upon seeing Reiger's blade.

That blade, like Type One, surely surpassed everyone's sense of knowledge and imagination.

With the techniques those swordsmiths possessed, they couldn't even begin to imagine why such a blade existed in this world, only feeling that it was a divine creation, a sacred blade.

Kochou Shinobu felt the same way now; she couldn't imagine how such a mechanical doll could exist in this world, almost making her believe Reiger was a deity capable of creating new life.

Unaware of Kochou Shinobu's feelings, Reiger examined the Zero Model for a while, then suddenly activated the Translucent World.

"It is indeed inside."

Having confirmed something, Reiger reached out, grabbed the head of the Zero Model, and twisted forcefully.

"Snap!"

In a crisp sound, the head of the Zero Model was twisted off.

"Ahhhhhhhhhhhh!"

Kochou Shinobu immediately let out a scream of utter terror.

Reiger, however, had already reached his hand into the neck of the Zero Model again.

The next second, a blade was pulled out by Reiger from inside the Zero Model.