And now, the emergence of Soul Crystals was the third method Fang Zhou had mastered for obtaining the precious resource of Soul Power.

He gently rubbed his chin, a thoughtful look in his eyes.

Soul Crystals are definitely a good thing. But why does the Mirror of the Heart, this particular Marvel, contain them?

After much thought, a guess formed in his mind.

Perhaps it's because the Mirror of the Heart is a relic of an ancient civilization. It must have undergone some elusive transformation in the river of time, giving birth to these precious Soul Crystals.

Shaking his head, Fang Zhou stopped pondering the mystery. From his experience so far, Soul Crystals were a matter of luck, not something one could actively seek out. That was a question to be explored later.

Fang Zhou took a deep breath and once again carefully took stock of the resources he had just acquired from Gu Yueyuan.

I can hold off on learning from the Apothecary Class Change Skill Book for now.

In Fang Zhou's plans, while Apothecary was a good choice for a Sub-profession, it had a lower priority compared to Alchemist. Alchemy could not only be used to create higher-level Enchantments but also to craft practical tools and Equipment. For an Undead Mage like Fang Zhou, who pursued ultimate power, it was clearly the more valuable path of development.

Next, his gaze fell on the *Insights on Insect Toxins* that Gu Yueyuan had gifted him. The book detailed many unique techniques for utilizing insect toxins. Fang Zhou planned to wait until the Skeleton Clone finished analyzing the Zombie's Talent Skills before using it, believing the combination would surely produce unexpected results.

Besides these two books, Fang Zhou had also acquired a series of peculiar potion bottles. These bottles varied in shape and color, and each had its own unique purpose. This was especially true for the few bottles of Insect Food Pills, which were food specially prepared for the Pearl Bird, Gugu, to promote its growth and evolution.

However, considering the Sealed Bone Bell used to seal Gugu had not yet been modified and upgraded, Fang Zhou still had some time to raise the Pearl Bird. So, he sorted these precious potions and arranged them neatly, preparing for any future combat missions.

Once everything was in order, Fang Zhou rose and walked to the Concentration Meditation Room while also directing his Skeleton Clone to begin a new round of slaughter and leveling. At this moment, the Skeleton Clone's Strength attribute was just one step away from the 50-point milestone. According to Fang Zhou's estimate, the Skeleton Clone's Strength attribute would likely break through 50 points tonight, allowing it to advance to Middle Rank Black Iron.

With an upgrade imminent, Fang Zhou was filled with motivation.

「In the Corpse Hills, under the Blood Moon.」

Fang Zhou and his Skeleton Army stood at the center of death. After a night of slaughter, countless enemies had fallen at his feet, turning into a thick layer of ash blanketing the land.

The Skeleton Clone slowly bent down, extracting the last drop of Corpse Essence from deep within a Zombie's body. Its Strength attribute had finally reached 50 points. Based on Fang Zhou's experience, this was the threshold between Lower Rank and Middle Rank Black Iron.

Just as he expected, a mysterious and unfathomable power surged within the Skeleton Clone's frame, and a faint light seemed to flicker in the gaps between its bones. The Skeleton Clone's power smoothly advanced from Lower Rank Black Iron to Middle Rank Black Iron. The surface of its bones, once somewhat dull, was now covered in a layer of faint, silvery-gray that emitted a metallic sheen.

The most significant change occurred in the Skeleton Clone's arms. The once-slender bones suddenly expanded. Each one became thick and powerful, and the joints seemed to be reinforced by some invisible force. When the transformation was complete, the Skeleton Clone's body had grown to an astonishing height of two and a half meters, appearing even more majestic and imposing than before.

Fang Zhou clenched the Skeleton Clone's Bone Fist, an unprecedented sense of pride and satisfaction welling up within him. After battling in the Corpse Hills for so long, he had finally broken through to Middle Rank Black Iron. Not only that, but its Strength attribute had reached 50, and its average across the Four-dimensional Attributes had reached 45.

This also meant his Skeleton Monarch skill would allow him to summon more and stronger Skeleton Servants to become his powerful aids in conquering the world.

Fang Zhou's gaze turned to the Clone's attribute panel, his heart filled with anticipation.

[Clone] Skeleton Warrior

[Tier] Middle Rank Black Iron

[Attributes] Strength 50, Constitution 45, Agility 45, Spirit 40

[Equipment] Skeleton Long Spear +2 (Grade 2 White Bone Stone *2), Skeleton Armor +2 (Grade 2 White Bone Stone *2)

[Marvel] Berserker Mark (Purple)

[Skills] Skeleton King (Black Iron, Innate), Corpse Armor (Black Iron, Innate), Brutal Strike (Black Iron, Skilled), Heroic Charge (Black Iron, Skilled), High-level Weapon Specialization (Black Iron, Mastery), Block and Counterattack (Black Iron, Mastery), Victory Battle Cry (Black Iron, Mastery), Horror Roar (Black Iron, Skilled), Unknown Skills (Analyzing)

[Apostles] 2

[Servants] 45

With over 200 Soul Power in reserve, Fang Zhou had the capital to grow. This meant he could choose another universal Black Iron-rank Combat Professional Skill to learn and further expand his Skill Tree.

Fang Zhou already had a clear idea of which of the many skill options to choose. He had already mastered all the skills that could feed back to his main body and enhance his own strength. Now, he needed more powerful combat skills to face the challenges ahead.

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