When Herag had only fused into his inner domain just two or three rules like time and space, he didn't have any particularly noticeable sensations.

However, after fusing all the other rule power into his body over this period, he felt a qualitative change in his body.

Space, Time, Fire Element, Wind Element, Thunder Element, Earth Element, Water Element, seven kinds of rule power fused into his body.

Herag felt that his physical body underwent some mysterious changes, if before his body was simply high in physical strength with strong defensive abilities.

Then now, his body had high strength on the rule level, with extremely high defensive measures against attacks of various rule power levels.

Herag had a momentary illusion, a sense that perhaps in the future, his physical strength might even become as unbreakable as those of the planes.

Herag raised his hand, glanced at his arm, as if seeing a stream of light emerging on the surface of his body.

But upon closer inspection, that stream of light did not actually exist.

Herag thought for a moment, took out a dagger, and stabbed it fiercely toward his arm.

After the dagger touched his arm, the arm had no wound whatsoever.

Not only that, but it didn't even leave a white mark.

Herag suddenly drew in a breath of cold air, as something dawned on him.

When he stabbed his arm with the dagger, his body seemed to instinctively operate some power to defend.

This resulted in Herag not feeling the dagger contact him at all.

In other words, it seemed that the dagger had contacted the skin on his arm, but in reality, it never touched it.

Herag was somewhat perplexed, as this seemed to resemble the result of the operation of spatial rules, yet he saw no disturbance in the spatial rules around him.

Just as he was puzzled, the toad watching all along suddenly spoke, "Kid, it looks like you've mastered something extraordinary."

"How so?" Herag asked, as the toad was knowledgeable and might know the changes in his body.

The toad crawled over, observed Herag's body for a moment, and asked, "The magic you used just now, did you absorb the rule power into your body?"

"That's right," Herag replied.

"Truly amazing, it's the first time I've heard of someone being able to absorb rule power into their body," the toad exclaimed.

Herag realized that the magic of the World Furnace was even more powerful than he had imagined, even a being like the toad expressed astonishment.

After advancing to a Level 2 Wizard, he had not paid much attention to the World Furnace magic.

After the first two times of fusing rule power, his body didn't seem to have any special changes, so he didn't pay much attention.

It wasn't until this time that Herag realized the extraordinary nature of this magic.

The toad crawled back and forth inside the house, like an old man pacing.

After thinking for a while he said, "Describe your current situation in detail again."

Herag then recounted the entire process of fusing rule power, describing the results of the fusion, the sensations, and the changes in his body with great clarity.

After a moment of contemplation, the toad spat out two words: "Inner Domain."

"Inner Domain? What is that?" Herag asked.

The toad explained, "An Inner Domain is a method only available to a Level 4 Wizard, allowing them to operate self-created rules within their domain. Within their domain, a Level 4 Wizard is almost invincible. A Level 3 Wizard has almost no ability to resist against a Level 4.

A Level 3 Wizard needs to create a rule of their own to advance to a Level 4 Wizard.

Creating a rule is an extremely arduous process, requiring a deep understanding of rules, along with high talent and analytical ability, to have a narrow chance of creating a rule.

Once a Level 3 Wizard creates a rule of their own, they can form their domain and advance to Level 4 Wizard.

In their domain, a Level 4 Wizard is akin to the Master of the World within that domain, all rule power will adhere to their commands.

This Master of the World is different from when Herag became a Master of the World using the World Staff, which only allowed him to sense and see the presence of the rules.

But he was too weak, the rule power he could mobilize was extremely limited, and he might exhaust himself if not careful.

But a Level 4 Wizard is different, they possess strong enough power to mobilize rule power effortlessly.

Under such circumstances, once a Level 3 Wizard enters the domain of a Level 4 Wizard, they are almost lambs to the slaughter.

Because in the domain, a Level 3 Wizard can hardly mobilize rule power, all rule power is under the control of the Level 4 Wizard.

With a mere thought, a Level 4 Wizard can cause a Level 3 Wizard to be annihilated.

Such is the terrifying nature of a Level 4 Wizard.

The more powerful the Level 4 Wizard, the stronger and larger their domain is.

At the Level 4 Wizard stage, the competition is about whose domain is stronger and has more depth.

The Wizard Organization 'Eye of the Storm' acts so assertively because the Eye of the Storm himself is the closest being to a Level 5 Wizard, with a strong domain.

Few other Level 4 Wizards in the Land of Dawn are a match for the Eye of the Storm.

After hearing the toad, Herag gained some understanding of the concept of a domain.

He asked with some confusion, "But I'm just a Level 2 Wizard and have not created a rule of my own, how does what you said about the domain relate to me?"

The toad looked at Herag and said, "That's the frightening aspect of your magic. Although you haven't created a rule of your own or formed an external domain, your inner domain is equivalent to a domain, the Inner Domain."

"Inner Domain..." Herag pondered the implications of these words.

The toad said, "Even with my existing knowledge, I can't explain the principle of the World Furnace spell you mentioned. But from the current situation, when you absorb enough rule power, you form a domain within, self-contained."

"An Inner Domain, impenetrable by non-rule power, immune to all laws. To harm your body, rule power must vastly exceed your own strength to deal effective damage. In other words, the robustness of your body is already ridiculously high."

Herag suddenly recalled the process of stabbing himself with the dagger, realizing that such physical attacks were completely ineffective on him.

Not that it couldn't pierce the skin, but it was directly ineffective.

Herag contemplated the toad's words, it seemed that his personal safety could greatly increase in the future.

From the current situation, he can mostly be immune to attacks of rule power of the same level in the future.

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