"The library?"

Merlin raised his head and looked closely at the two gigantic doors in front of him. At two sides of the doors, there were two stone piers with monsters, which Merlin had never seen before, carved on them. They appeared life-like where they sent a chill down people's spine.

A strange aura clinged to the library of Abyss Fort.

Merlin frowned, then glanced at Wizard Leo.

Wizard Leo appeared calm as he said, "Go in and choose the spells you need!"

Merlin nodded, then took a deep breath and walked toward the door.

Right after he stepped onto the stairs, he immediately felt a blanket of darkness before him. It was as if his surrounding had turned dark suddenly. He had lost all senses; he could neither see, hear nor feel anything.

"Illusion?"

Merlin was in shock. Since he had experienced countless illusions when he was in Darkness Void and while cultivating Darkness Heart, he was rather familiar with illusions by now. When he was caught up in situations like this, he immediately knew that this was an illusion.

Soon, without letting out his strong conviction, the marking of Darkness Heart on Merlin's chest began to give off a warm presence. Following that, Merlin felt a numbing and cooling sensation in his mind. Then, he came back to his senses.

This was the ability of Darkness Heart. Obviously, he was attacked by a Darkness-type spell earlier, and Darkness Heart had blocked most of the effects of the spell attacks. With Darkness Heart, especially the third type, it was almost impossible for Merlin to be injured by a Darkness-type spell.

"Who is it?"

Wizard Leo was the first to react. The red vertical eye on his forehead flashed a bloody red, then the light shattered the space and was shot toward a dark place.

"Bang!"

There was a dull sound. Then, a skinny black-robed old man showed up even after taking the attack from Wizard Leo's Darkness Eye. He stumbled forward a little; the blow given by Darkness Eye was apparently harsh on him as well.

"Darkness Eye?"

The skinny old man's expression kept changing with a hint of shock. Then, he glanced at Merlin and exclaimed with a low voice, "Darkness Heart!"

The skinny old man's gaze kept darting back and forth between Merlin and Wizard Leo while wearing a dark expression. He was a Seventh-level Spell Caster, but it turned out that he could not even delude Merlin with his spell. Moreover, he even became flustered by Darkness Eye of a Spell Caster who was barely a Sixth-level.

"Wizard Leo, don't misunderstand. This is Wizard Treman who takes care of the library!"

After Wizard Hobbes saw the skinny old man, he quickly budged in to explain.

Wizard Leo did not cast his Darkness Eye further; he simply stared at the skinny old man with the red vertical eye on his forehead, without the slightest intention to lower his guard.

Merlin also stared at the old man in confusion. The latter had obviously cast a spell earlier, but he did not notice even the slightest movement. This was enough to prove that this old man was at least a Seventh-level Spell Caster.

However, the Darkness-type spell cast by the Seventh-level Spell Caster was easily blocked by Merlin's Darkness Heart. This also revealed another ability of Darkness Heart – the ability to block most of the Darkness-type spells.

In other words, even the Darkness-type spells cast by the Seventh-level Spell Casters would not be able to harm Merlin at all.

After a moment, Wizard Hobbes seemed to have cleared the confusion with the skinny old man, Wizard Treman. Then, he approached Merlin and said, "Wizard Merlin, you can enter and choose your spells now. After choosing them, Wizard Treman will undo the Runic Magic Circles on the spells for you."

Merlin nodded. The library of Abyss Fort was the same as that of the Dark Magic Region where spells were protected by unique Runic Magic Circles. One could only read the content after Wizard Treman had undone them personally.

Thus, Merlin proceeded forward, and the two gigantic stone doors were slowly pushed open. His figure then disappeared from others' sight.

The skinny old man, Wizard Treman, took a long glance at Wizard Leo and said, "Darkness Eye, not bad. You cultivated the true Darkness Eye!"

After saying that, the old man entered the library following Merlin.

Wizard Leo was unmoved regarding the skinny old man's words. The sole eye on his forehead looked at Merlin's back, and the scene slowly coincided with the figure that popped in his mind.

"Raydore… My brother, he looks just like you! Have you returned to me at last?"

Wizard Leo mumbled with his head lowered while revealing a nostalgic expression.

…

Right after he entered the library, Merlin felt a chilly sensation. The library was very different from the Resource Tower in the Dark Magic Region. The Resource Tower was always packed with people and appeared lively while this library seemed quite empty. It seemed as if people had not visited this place for a long time.

Merlin was a little confused. "Does no Spell Caster in Abyss Fort choose their spell here?"

"Abyss Fort is different from the Dark Magic Region. There're not many Spell Casters in Abyss Fort since not all Spell Casters can adapt to Darkness-type spells… Alright, take your pick quickly. Your teacher, Leo, is actually willing to exchange for your chance to choose spells here with his Darkness Eye. You should make good use of it."

Behind Merlin, a sharp and piercing voice rang abruptly. It was Wizard Treman who had quietly attacked Merlin earlier.

Merlin nodded as if he was deep in thought. Then, he began to read a large number of spells available in the library.

These spells were not entirely Darkness-type spells. After all, Abyss Fort was only good at Darkness-type spells. They still needed other types of spells if they aimed to become powerful Spell Casters.

It was just that a major portion of the spells in the library was Darkness-type spells; they took up about thirty percent of all spells.

Merlin easily found the shelves that contained Darkness-type spells. On the shelf, any spell, ranging from Second-level to Sixth-level, was available. Furthermore, there was a wide variety of them; Merlin had a hard time selecting his picks from the vast options.

"If you can construct Six-Elemental spells, I'm sure that you're quite knowledgeable in terms of constructing Spell Models. Since Leo has paid such a great price for you to choose your spells here, surely he doesn't expect you to choose ordinary spells. Hehe, if you're confident, choose your spells from the last row. The most peculiar, powerful, and complicated spells are all kept there."

Wizard Treman was staring at Merlin when he realized that Merlin did not know where to begin, thus he hinted Merlin by pointing at the last row of the shelves.

Merlin was elated. He had the Matrix with him, so he was not afraid of the complexity of the Spell Models. On the contrary, he would need to choose the ones that were most compatible with him and contained stronger power. After hearing Wizard Treman's suggestion, Merlin no longer wasted his time at other places. He headed straight toward the last row of shelves.

Only a small portion of spells was placed here. Merlin took one out randomly and flipped it open lightly. After reading through the introduction, Merlin was immediately hooked on it.

The spells here were not any ordinary spells. They either possessed a special effect or were exceptionally strong. However, their Spell Models were also quite complicated.

Dark Mist and Dark Light Realm in which Merlin had constructed were also kept in this row.

However, this time, Merlin had to choose the spells of Second-level to the Sixth-level. He would pick one spell for each level. In the case of a Seventh-level spell, not a single spell casters' organization would possess any. Once he reached the peak of a Sixth-level Spell Caster, he would need to derive the spell that was most suitable to him if he was to become a Seventh-level Spell Caster. Other spells would not be helpful at all.

Merlin carefully considered all spells on the shelf. He would construct it in his Awareness in the future once he chose a spell, so he would need to think it through before making his choice.

Wizard Treman was not rushing; he squinted his eyes and slowly observed Merlin as Merlin flipped through the available spells without a sound.

After about four or five hours, Merlin finally showed a smile on his face. Currently, there were two books in his hands. This meant that he had chosen two spells.

These two spells were Second-level Darkness-type spell, Darkness Tide and Third-level spell, Darkness Vortex.

The spells both carried a strong hallucinating effect. Should he construct and cast Darkness Tide, the effect of his attack would be even more terrifying than Dark Light Realm. The darkness would befall upon the people strongly like an endless tide.

Meanwhile, Darkness Vortex was well-known for its ability to devour all Mind Power. If a Spell Caster with a powerful Mind Power fell into Darkness Vortex, his Mind Power would be consumed and he would fall into the illusion.

These Second and Third-level spells were extremely powerful and had complicated Spell Models. Many Spell Casters in Abyss Fort did not choose these two spells easily.

Merlin could quickly choose his Second and Third-level spells, but he had to be extra cautious when choosing the Fourth-level.

As soon as he chose the Fourth-level spell, he could merge it with Darkness Heart. Thus, Merlin had to be careful about the spells of Fourth-level and above.

"Darkness Nightmare, the ultimate hallucinating spell. It's able to delude people with its extremely realistic illusion without them knowing it. Moreover, its illusions were layered, making it difficult to differentiate between reality and illusions. It induces fear in people just like a nightmare does…"

Finally, Merlin set his gaze on a spell named Darkness Nightmare. This spell was coincidentally a Fourth-level spell and was considered the ultimate hallucinating spell.

Such a spell could make most Spell Casters fall into his illusions. Of course, if even Darkness Nightmare could not delude the person, no other spells could delude the person at all.

Moreover, once one's Mind Power had exceeded a certain extent, it would be difficult for them to be deluded. It was the same for a spell that was stronger; it could hardly delude the Spell Casters with superb Mind Power.

Hence, the Fourth-level spell, Darkness Nightmare, was considered the ultimate hallucinating spell. Fifth-level spells and above were mainly correlated with illusions and physical attacks. Illusions were mainly just a supportive spell.

Following that, Merlin chose the Fourth-level spell, Darkness Nightmare, without hesitation. Merlin had been in the library for about three days now.

Merlin still had to choose his Fifth-level spell and Sixth-level spell. At this point, this was a whole new area for him because Darkness Nightmare was considered the ultimate hallucinating spell. After this mark, Darkness-type spells would slowly be improved toward the aspect of physical attacks.

After all, a hallucinating effect was not the only good points from a Darkness-type spell!