Thunder was a violent element by nature. Although both Thunder-type spells and Fire-type spells were Offensive spells, there was a vast difference between the two.

Fire-type Offensive spells were mostly longer-lasting or used high temperatures to burn their opponents. These spells could be sustained for extended periods but their explosive powers were weaker by comparison.

On the other hand, Thunder-type spells were distinctive in their instantaneous explosive powers. Their biggest advantage was that they were extremely violent, and could detonate an explosion of unparalleled power in an instant.

The same was true of the Thunder Maxim. A violent, destructive aura filled the surrounding atmosphere. Despite Merlin's wide repertoire of tactics, if even the slightest trace of the power of the Thunder Maxim had leaked out, he would not be able to withstand the terrifying power of the Thunder Maxim.

However, Merlin was now holding the Neverending Book with all three volumes combined, which acted as a key to absorb and fuse together with the Thunder Maxim. Only with the three volumes of the Neverending Book in hand that it was possible to get close to the Thunder Maxim without harm.

Merlin's figure quickly moved toward the Thunder Maxim. The violent aura continued to swirl around the chamber. However, with the protection of the Neverending Book, he was safe.

Although Merlin was not harmed by the Thunder Maxim, the closer he got toward the violent Thunder Maxim, a terrifying amount of pressure began to exert on the Thunder-type Spell Models in his body. It felt as if these Spell Models would collapse if he got any closer to the Thunder Maxim.

Fortunately for Merlin, all his Spell Models had been carefully constructed by the Matrix, especially his Fourth-level spells, which were completely derived using the Matrix. Their compatibilities were as high as a hundred percent. Thus, the Spell Models were extremely stable and able to withstand such great pressure.

Perhaps, this was also one of the tests of the Great Legend. If someone was unable to bear the force of the Thunder Maxim and as a result his Spell Models collapsed, how then would such a Wizard be worthy of inheriting the Thunder Maxim?

"Whoosh".

Merlin fiercely bit his lip and despite the huge pressure on his body, increased his pace. Quickly, he came before the Thunder Maxim. With an outstretched hand, he grabbed the Thunder Maxim in his hand.

"Boom!"

The Thunder Maxim exploded with a burst of violent power. Merlin felt like he was completely submerged in water, unable to put up even a trace of resistance as the Thunder Maxim pierced into his body.

However, the Thunder Maxim was unlike the Ice Maxim. For one, the Thunder Maxim was massive. Its size was even bigger than both the original Flame Maxim and the Ice Maxim put together.

Despite such a massive Thunder Maxim entering Merlin's Awareness, it stayed genially inside his Awareness. Of course, the reason for its geniality was because Merlin possessed the three volumes of the Neverending Book, thus fulfilling the preconditions set by the Great Legend who had left behind the Thunder Maxim. As a result, Merlin was able to obtain the Thunder Maxim smoothly.

The fact that he was able to obtain the Thunder Maxim so easily stumped even Merlin himself. In an instant, the terrifying and suffocating aura in the chamber subsided.

At a glance, it might have seemed easy for Merlin to obtain the Maxim. However, the truth was, obtaining the Thunder Maxim required the combination of three volumes of the Neverending Book, and possessing any individual volume would reveal nothing but false leads.

Thus, even after so many years, the only Wizard who had managed to compile all three volumes was Merlin. Furthermore, it was partly attributed to chance that he had managed to compile the three volumes. Therefore, although it appeared simple for Merlin to obtain the Thunder Maxim, it required a perfect alignment of a series of circumstances to be able to smoothly obtain it.

The Thunder Maxim sat quietly in Merlin's Awareness. Although it had been deliberately left behind by the mysterious Legendary Wizard to be inherited by another Spell Caster, due to the unique nature of Maxims, its power would not be able to be used by anyone besides a Legend.

Nevertheless, this Thunder Maxim also contained a message. Inside the Thunder Maxim was a message from Wizard Saitu, the mysterious Legend who left behind the three volumes of the Neverending Book.

Wizard Saitu was a powerful Wizard who had achieved Legendary status through this Thunder Maxim. The purpose of him leaving behind this Maxim was attributed to his own impulsive behavior. If anyone managed to obtain this Thunder Maxim, the person would be able to go to a specific dimension to search for Wizard Saitu. Then, upon passing Wizard Saitu's test, the person would become Wizard Saitu's student.

Merlin slowly opened his eyes. He had received all the information contained in the Thunder Maxim. He did not expect that this Wizard Saitu occupied a dimension.

During the Spell Casters' most glorious era, Legendary Wizards exiled the gods and began to step into other dimensions. One after another, the dimensions were occupied by Spell Casters. With the accumulation of large amounts of resources, countless powerful Wizards were able to be molded.

Therefore, some of the powerful Legendary Wizards occupied one or more dimensions. Wizard Saitu was obviously a powerful Wizard who occupied his own dimension.

However, many years had passed since then, and even the Molta Empire had collapsed and became nothing but a drop in the endless flowing river of history. There were no longer any Legendary Wizards left in the Glorious Land. In addition, it was unknown whether this Wizard Saitu was still alive.

Merlin took a deep breath and said slowly, "This discovery about the dimension is still far from my reach. The most important problem to solve is this ticking time-bomb, the fourth form of the Darkness Eye. It's most unfortunate that despite obtaining this Thunder Maxim, I can only temporarily delay but not eradicate the backlash from the fourth form of Darkness Eye!

In order to control the fourth form of Darkness Eye, Merlin would have to wait until he leveled-up to a Seventh-level Wizard where his Mind Power had undergone a transformation and had constructed a Seventh-level Darkness-type spell. Only then, would he be able to subdue the fourth form of Darkness Eye.

Before that, even with the power of the Maxim, all the Maxim could do was suppress the fourth form of Darkness Eye. Additionally, to keep it constantly suppressed would require steady consumption of the Maxim. If the fourth form of Darkness Eye was wielded, then it would consume even more of the Maxim to suppress its backlash.

Therefore, upon obtaining the Thunder Maxim, the first thought that came to Merlin's mind was not to derive new Fifth-level spells but to check how long would it be able to suppress the fourth form of Darkness Eye.

According to Merlin's analysis which was based on the current consumption rate of existing Maxims used to suppress Darkness Eye, as long as he did not wield the fourth form of Darkness Eye frequently, the Thunder Maxim would be able to suppress Darkness Eye for another few decades.

The time period of a few decades was probably nothing more than a snap of a finger to most average Spell Casters but in Merlin's eyes, it was a relatively long time.

This was because from the time Merlin first came into contact with spells up to his present level, his growth had taken less than a decade. Thus, a few decades were enough for Merlin to make earth-shattering changes.

"Fuh…"

Merlin exhaled deeply. With the Thunder Maxim, he could temporarily stop worrying about the backlash of Darkness Eye. Based on the current growth pace of Merlin's Mind Power, a few decades would be enough for him to become a Seventh-level Spell Caster.

However, the only remaining concern was how to derive new spells. Regardless of Fifth-, Sixth- or Seventh-level spells, they all required large amounts of Maxim to be derived.

As a result of the divinity, Merlin's Mind Power had achieved the peak of Sixth-level, so he was able to construct a number of Fifth-level spells. Due to the scarcity of Maxim, however, he was considering whether he should first use some of the power from the Thunder Maxim to derive some spells and become a Fifth-level Spell Caster as soon as possible.

However, with much consideration, Merlin temporarily set aside the idea to use the Thunder Maxim to derive Fifth-level spells. After all, the Thunder Maxim had been difficult to obtain, and thus, he should not simply exhaust it.

Perhaps, this was also the final Maxim that Merlin would be able to find. Hence, it was most important to use it to suppress Darkness Eye.

As for the derivation of new Fifth-level spells, Merlin could take a closer look at the Matrix in the future, whether it could only derive new spell using Maxims.

If it was possible to leverage on other kinds of powers to derive new spells, then Merlin would no longer have to worry about the scarcity of Maxim. Regardless, all of these will require more time to ponder.

"Swish".

Merlin left the chamber and flew out of the passage.

"Master!"

Wizards Ernie and Watson quickly flew before Merlin while Puppet Number Three walked mechanically to Merlin's side.

"Did anyone come here?"

Merlin asked slowly.

"Master, the Mill clan seems to revere your power, so they did not dare send anyone else here." Wizard Ernie reported with a tinge of pride. Earlier on, Merlin had casually slain three Seventh-level Wizards who were even more powerful than Ernie and Watson. While this shocked Wizard Ernie to no end, he was also somewhat thankful.

As long as they tried their best to follow after Merlin and gave their best, even as slaves, they would definitely reap some benefits from him. Merlin was already so powerful right now and would likely become even more powerful in the future. So, following a powerful Wizard would not humiliate their statuses as Seventh-level Wizards.

The principles of Spell Casters in Subzero Snowfield differed greatly from those who had matured in peaceful environments. In Subzero Snowfield, they abided by "the survival of the fittest" rule, so following after a powerful Wizard was not considered shameful in the least.

A strange glimmer flashed in Merlin's eyes, and a smile appeared on his lips. "No one came? Even though the Mill clan did not come, I have some questions to ask them!"

Upon finishing his words, Merlin's figure rose into the sky and flew toward the foot of the mountain. Ernie and the others exchanged a look with one another and quickly followed behind him, flying toward the Mill clan at the foot of the mountain.