The giant black wolf was the guardian spirit of the fourth floor. It was comparable to a Fourth-level Spell Caster. Though the three Spell Casters earlier could have defeated the giant black wolf alone, it still looked rather difficult. It took them quite some time to defeat it.

Moments ago, Merlin also watched their attempt at the side. Hence, he had now grasped the giant black wolf's characteristics. It was fast and had a strong defense. Even if it was attacked by a Fourth-level spell, it could still take it. It was quite a tricky opponent for a typical Third-level or even Fourth-level Spell Caster.

"Quick speed? Strong defense?"

Merlin grinned. These characteristics of the giant black wolf could almost entirely be restrained by him. On speed, Merlin had Flash Wind, which was incredibly fast. On defensive power, Merlin had Pandora Demon Ability, Fuse Earth, which was incorporated into spells. It was capable of withstanding the attack of a Sixth-level spell.

"Swoosh."

The giant black wolf turned into a black ray of light and charged toward Merlin. Merlin gently extended his finger, and in between his fair-skinned fingers were traces of white fire.

"Chi-"

Merlin flicked his finger. A white flame spurred out and swiftly spread out, turning into a fist-sized fireball.

"Boom!"

The fireball smashed into the giant black wolf. The giant black wolf did not even have time to react as it was engulfed by the flame right away. Its figure collapsed instantaneously in the scorching high temperature.

"Too weak!"

Merlin shook his head lightly. Perhaps for an average Spell Caster, the real test truly began on the fourth floor of the Runic Tower because only at the fourth level would the guardian spirit be comparable to a Fourth-level Spell Caster. Besides, the Third-level was the highest level for a Spell Caster who could enter the Runic Tower.

Starting from the fourth floor, it would basically be a cross-level challenge for Spell Casters. Thus, it could be deemed as a real test!

Nevertheless, Merlin was not any average Spell Caster, so the fourth floor was not really a challenge for him.

"Next should be the fifth floor!"

Merlin's entire body was covered in white light and he disappeared instantly.

...

On the fifth floor, the three Spell Casters – Wizard Sarah, Wizard Envia, and Wizard Ilman were staring at the few stone pillars in front of them with serious expressions.

Wizard Envia even looked back and glanced downward. He said with a deep voice, "We have to hurry up. I didn't expect Merlin to be so quick. He has almost caught up with us. We must defeat the guardian spirit of the fifth floor as fast as possible!"

None of them were able to pass the fifth floor of the Runic Tower. They still felt that it would be a tricky task even though they were united now.

Their only hope was the Kleinman Runic Magic Disc that Wizard Envia had acquired by paying a huge price. The three of them were considered among the most talented in runology in the entire Dark Magic Region. They were Spell Casters who studied runes profoundly.

It was precisely because of this that these three had activated such a complex Runic Magic Circle like Kleinman Runic Magic Circle as this was their only hope. It was an asset which they relied on for their challenge on the Runic Tower this time.

In the most glorious era of Spell Casters, Runic Magic Circles were not weaker than Pandora Demon Abilities. The only downside was that studying runology required the sacrifice of time and energy. Therefore, many Spell Casters simply chose to cultivate Pandora Demon Abilities rather than studying runology.

Now was an era where Spell Casters were declining, so runology became even more reclusive. Spell Casters who were proficient in runes were even rarer. The Dark Magic Region had always specialized in runology, so that was why there could be some Spell Casters who were outstanding in runology.

These three were undoubtedly among the few in the Dark Magic Region who had excellent talent in runology. Otherwise, if it were other people, even if they had gotten the Kleinman Runic Magic Disc, they would not be able to activate it either.

Seeing the nervous look on Wizard Envia's face, Wizard Ilman seemed to be very calm and relaxed instead. "Wizard Envia, be rest assured that the giant black wolf on the fourth floor isn't easy to defeat. Even if Merlin is really a genius like Kleis, it'd still take him a lot of effort to deal with the giant black wolf. We have plenty of time to challenge the fifth floor!"

Wizard Envia also nodded slightly. He too knew that the giant black wolf on the fourth floor was not so easy to defeat as it took the three of them a long time to pass that floor.

Nonetheless, he said cautiously, "Anyway, we still have to hurry up and don't take things lightly! We should begin. Let's first incorporate our respective Mind Power into the Kleinman Runic Magic Circle and make all the necessary preparations. When the guardian spirit of the fifth floor appears, we'll immediately activate the Runic Magic Disc. We shall combine all three of our Mind Power and activate the Kleinman Runic Magic Circle to kill the guardian spirit of the fifth floor!"

As their voices landed, a round disc which emitted white light appeared in the hands of Wizard Envia. There were mysterious runes engraved on the round disc.

This was the Kleinman Runic Magic Circle. It was extremely precious and was obtained by Wizard Envia at a great cost. It required at least three Spell Casters skilled in runology to successfully activate it.

Once the Runic Magic Disc was mobilized, the Kleinman Runic Magic Circle, which had already been set up in the Runic Magic Disc, could be activated to unleash unparalleled power.

Seeing the Kleinman Runic Magic Disc, envious looks appeared in the eyes of Wizard Sarah and Wizard Ilman. A Runic Magic Disc like this was very precious. As a spell casters' organization that specialized in runology, the Dark Magic Region would naturally have such a Runic Magic Disc in the Resource Tower. They even had Runic Magic Discs which were more powerful than the Kleinman Runic Magic Disc.

However, the price of those Runic Magic Discs was expensive beyond imagination. Any Runic Magic Disc like that would cost thousands of contribution points. It was way too expensive, even for those Fourth-level or higher-leveled Spell Casters.

Even the Kleinman Runic Magic Disc obtained by Wizard Envia was not exchanged from the Resource Tower, but gotten from the outside through some special methods.

The only reason why Wizard Envia had such a huge fortune to purchase this Runic Magic Circle was because he was born in a powerful Spell Caster clan. As for Wizard Sarah and Wizard Ilman, they could only secretly envy him.

"Hurry up and put your Mind Power into the Runic Magic Disc..."

Wizard Envia hushed them in a deep tone.

Wizard Sarah and Wizard Ilman had gotten a little impatient too. Though they had simulated this before, it was merely a simulation. Wizard Envia would never simply take out such a precious Runic Magic Disc for them to try. Only when it was really needed would they be allowed to engrave their Mind Power into the Runic Magic Disc.

"Swoosh."

Suddenly, a white light flashed through the fifth floor. Wizard Envia and the others immediately noticed the change. They stared at this white light which suddenly appeared.

Soon, a black-robed figure slowly emerged from the white light.

Seeing this figure, the expressions of Wizard Envia and the others changed instantly.

"How can he be so fast? How can the guardian spirit on the fourth floor be defeated so quickly?"

"He actually made it to the fifth floor. I initially thought that the fourth floor would delay Merlin but I didn't expect that Merlin will reach the fifth floor in the blink of an eye. It seems that the giant black wolf on the fourth floor didn't cause Merlin any trouble at all."

Wizard Ilman, who had just vowed that Merlin would spend some time on the fourth floor, looked extremely embarrassed. Yet, at this moment, there was none who noticed his embarrassment. There was only a strong urgency in Wizard Envia's mind.

"Quick, engrave your Mind Power into the Runic Magic Disc. Merlin was stronger than we thought. We can't let him break into the sixth floor before us!"

Wizard Envia urged immediately. Hence, Wizard Sarah and Wizard Ilman also recovered their senses and immediately mobilized their Mind Power and engraved a trace of it into the Runic Magic Disc.

"Hum hum hum."

Suddenly, the Runic Magic Disc in the hands of Wizard Envia erupted with a dazzling ray of light. Mysterious runes appeared in mid-air in succession, which then flew to the outer bodies of the Spell Casters. It was like a layer of armor, shielding the three in the mysterious runes.

After finishing this, Wizard Envia and the other two did not hold back. They immediately leaped in between the few vermilion pillars and began to face the guardian spirit of the fifth floor.

Merlin, who had just arrived on the fifth floor, frowned slightly. He had an inexplicable feeling. He sensed a faint hostility from the looks of Wizard Envia's trio.

Merlin remembered very clearly that he did not know the three at all, so how could they be hostile to him? It was indeed puzzling!

However, when he saw Wizard Envia and the others rushing into the vermilion column and begin challenging the guardian spirit of the fifth floor, Merlin faintly understood why.

It turned out that these three people were afraid that he would pass the fifth floor first, and even pass the sixth floor before them. After all, after a millennium since the establishment of the Dark Magic Region, no one had been able to pass the sixth floor. Therefore, there were still treasures personally left by the Great Wizard Fidel on the sixth floor.

At the thought of this, Merlin also shook his head rather helplessly. This kind of "hostility" was really inexplicable. In his opinion, the trio was not really strong in terms of strength. The fifth floor was already their limit. It was already very difficult to get through the fifth floor, let alone the sixth floor.

Thus, Merlin was not worried at all. Instead, he squinted slightly and stood aside, closely watching the battle between the three and the guardian spirit of the fifth floor.

Merlin might be strong but after reaching the fifth floor of the Runic Tower, he also had to be more cautious. The guardian spirits assigned by Great Wizard Fidel would be stronger on each floor, so he could afford to be complacent.

"Splash!"

Just like the sound of water, when Wizard Envia and the rest stood in between the vermilion pillars, all the stone pillars began exuding dense white lights. These white lights gathered together like a small stream, eventually merging to become an ocean!

In the dense white light, there was vaguely a "fierce" life force, which had never appeared in the first to fourth floors of the Runic Tower.

"Roar!"

Suddenly, in the glaring white light, accompanied by dense Runic Magic Circles, a frightening roar resounded in the fifth floor of the Runic Tower.