In the huge dark hole, Merlin followed Master Leo, and his mental power was always paying attention to everything around him.

The dark passage was very long, and Merlin could feel that they were continuing to penetrate deeper into the ground. This Abyss Castle not only did not have buildings such as castles, but was built underground, with huge channels with all connections.

Soon, a light of light gradually appeared in the dark passage, and a light golden light appeared on the uneven walls.

"Here, Master Leo, it's not the first time you have come to my Abyss Castle, but this little guy is probably the first time he has come to the Abyss Castle, so I'm very curious!"

The old-looking Master Hobis showed a smile on his face when he saw Merlin looking around.

Merlin was indeed very curious. The hall was buried deep underground, but there was no feeling of depression. In the corners of the hall, there were four white glassware that seemed like lampshades. Inside was a huge crystal pearl, which emitted a soft white light from the pearl, illuminating the underground hall like daytime.

All the facilities of the Abyss Castle made Merlin feel a little incredible.

"Okay, let's talk about the serious matter! Master Leo, what does the dark eye you just mentioned mean?"

Master Hobis' expression also became solemn, and he asked in a hoarse voice.

The blood-colored vertical eyes on the forehead of Master Leo blinked slightly, and his eyes could no longer see, but this "Dark Eye" seemed to be able to replace his eyes, see everything around him, and seemed to be able to see things that ordinary people could hardly see, such as some illusions. He could not confuse Master Leo who had the Dark Eye.

"The cultivation method of the Dark Eye. What you get in the Abyss Castle is only a broken cultivation method. So after so many years, can someone in your Abyss Castle cultivate into the Dark Eye?"

Master Leo suddenly spoke, but he did not directly answer Hobis's question, but mentioned the practice method of the Dark Eye.

Master Hobis was naturally clear about this, so he sneered and continued, "Hehe, Master Leo. The cultivation method of the Dark Eye is indeed incomplete, which is not a secret, and the cultivation method of the Dark Eye you obtained should also be incomplete. However, you are indeed powerful, and you can create a method of cultivating the Dark Eye by yourself, thus cultivating the Dark Eye to great success."

In the eyes of Master Hobis, he was clearly curious about the method of practicing the Dark Eye that Master Leo created.

A smile appeared on the corner of Master Leo's mouth and said, "Sixty years ago, I came to the Abyss Castle and used some treasures in exchange for some of your dark spells. This time I came here, and I also gave you treasures. But this time, I gave me my original Dark Eye cultivation method!"

"Your original method of practicing the dark eye?"

A hint of burning flashed in Master Hobis's eyes. If others said they had created the method of practicing the Dark Eye, Master Hobis would definitely be disdainful.

However, it was Master Leo who said this, and his weight was very extraordinary. Master Leo was recognized as having cultivated the Dark Eye to great success. He even relied on the Dark Eye to kill the seventh level caster in Osmus.

With such a record, everyone will no longer doubt Master Leo's Dark Eye, and Master Leo's original Dark Eye cultivation method is naturally extremely precious and comparable to any treasure.

Thinking of this, Master Hobis couldn't help asking: "Master Leo, what do you want to exchange for the cultivation method of the Eye of Darkness?"

A smile appeared on Master Leo's face. As expected, his dark eyes showed strong strength. For the Abyss Castle, his original dark eyes were the most attractive method of cultivation.

So, Master Leo put his finger on the table and said in a deep voice: "You need to ask my student Master Merlin to go to your library to select any level 2 or above dark spells. This is one of them."

"Secondly, the Pandora magic energy in your Abyss Castle and the cultivation method of the Dark Heart must also be passed to Merlin. Moreover, Merlin needs to practice with your dark mystery for a few days, and it is best to cultivate the Dark Heart during this period. With these two conditions, if you agree, I will give you my original cultivation method of the Dark Eye!"

After Master Leo finished speaking, he quietly waited for Master Hobis' answer.

The face of Master Hobis was also a little gloomy, and his eyes kept falling on Merlin. He did not expect that this time, Master Leo used the precious dark eye cultivation method to exchange for Merlin's magic power of magic and the Dark Heart, which was the Pandora magic power. So he also wanted to see what special things about Merlin were that he had to help Merlin with such a lot of effort and pay such a great price.

After a long time, Master Hobis said, "First point, Merlin can choose dark spells above level 2, but he has to sign a contract and cannot pass on these spells."

"no problem!"

Master Leo nodded. When he came to exchange for spells in the Abyss Castle, he signed a contract and must not be passed on. The most critical condition he proposed was the second point.

"About the second point, Master Leo, you should know that the Heart of Darkness is unique to my Abyss Castle and has always been passed down."

Master Hobis said slowly, but his eyes were fixed on Master Leo.

"Hehe, Master Hobis, the Heart of Darkness is indeed not out of the box, but how is the Heart of Darkness compared to the Eye of Darkness? I believe you can think clearly which one is more important."

"The Heart of Darkness is of course very important, but you can also sign a contract with Merlin so that he cannot spread the Heart of Darkness, and even me cannot practice. In this way, Merlin can practice alone, but you have obtained the cultivation method of the Eye of Darkness. Perhaps the talented and persevering caster in the Abyss Castle, and if you have my cultivation method, you may not be able to practice the Eye of Darkness successfully."

The blood-colored vertical eyes on the forehead of Master Leo exuded a strange blood-colored light. After saying that, he stopped talking and quietly waited for the result of Master Hobis.

After a long time, Master Hobis stood up and said to Master Leo: "This matter is of great importance, I need to go and discuss it with someone."

"It's okay, we can wait."

Master Leo's face looked very calm and he said lightly.

Master Hobis nodded, then walked into the depths of the hall and left the passage on the other side. In this well-connected underground, if you had not lived there for a long time, you would not know where these passages would lead. If the Abyss Castle was in danger, many spellcasters could also quickly leave through these complex passages.

The Dark Spirit Realm is very mysterious. Even when entering and leaving the Dark Spirit Realm, you can only rely on rune magic arrays to teleport. It is very difficult for outsiders to find the Dark Spirit Realm. The Abyss Castle has built a huge and complex underground passage underground, making it difficult for outsiders to figure out these passages.

Therefore, it is difficult to be captured in a single place where these spellcaster organizations are located. This is also one of the main reasons why the spellcaster organizations can be passed on for thousands of years without being destroyed by devastating blows.

"Mentor Leo, what is the Heart of Darkness?"

After seeing Master Hobis leave, Merlin couldn't help but ask Master Leo. From the conversation between Master Hobis and Master Leo just now, Merlin only knew that Heart of Darkness is a kind of Pandora magic energy, unique to the Castle of Abyss, but Merlin was confused about what it was.

Master Leo explained calmly: "Dark Heart is a dark Pandora magic energy, but unlike the Dark Eye, Dark Heart is just an auxiliary Pandora magic energy. If you cultivate the Dark Heart, any dark spell you release will greatly increase its power, which is stronger than the effects of many amplification casting tools. Moreover, if you encounter the attack of dark spells yourself, Dark Heart can automatically resolve it. As long as it is not a particularly outrageously strong dark spell, it will not pose any threat to you."

After a pause, Master Leo's expression became solemn, and he said in a deep voice: "If only these are the only ones, I will not let you practice the Heart of Darkness. The biggest benefit of your practice the Heart of Darkness is that when you build a level 4 spell, at that time, the level 4 darkness spell you build will be able to merge with the Heart of Darkness, and the power of the spell will become extremely powerful."

"In fact, I have occasionally seen from some ancient classics that in the era when the casters were the most prosperous, every spell of the ancient and powerful spellcasters would merge with the Pandora magic energy. Even the first-level spells can have terrifying power. Time has passed, and the era of the most prosperous spellcasters has passed, and even most of the Pandora magic energy has been lost in a long history, let alone the method of the Pandora magic energy and spells? The only thing that I can find now is the heart of Darkness to merge with the Pandora magic energy."

Master Leo sighed, with a lot of emotion in his tone.

However, Merlin's heart moved slightly. It turned out that in the era when the casters were the most prosperous, Pandora's magic energy could be fused with spells. Even a first-level spell could have terrifying power once it was fused with Pandora's magic energy.

Merlin thought of his Pandora Demon's Fire, which has three forms of collapse. The third form of collapsed fire seems to be able to merge with the seventh level spell, which also indirectly confirms what Master Leo said just now, which is probably the fact.

Just when Merlin wanted to ask again, Master Hobis returned to the hall, and behind him were two powerful spellcasters. As soon as these spellcasters came to the hall, they did not say a word, squinted their eyes slightly, and kept looking at Merlin and Master Leo.
Chapter completed!