The next morning, a beam of golden sunlight shone through the window decorated with crude paper cutouts and fell on Isaac's smiling face, making it appear especially radiant.
Looking at the Demonic Rat on the operating table, now twice its original size, its bulging muscles and sharp claws and fangs proved that it had long since undergone a complete transformation!
This was the result of Isaac pulling an all-nighter—Quad-Core Demonic Rat!
Four cores, meaning four hearts!
It sounded ridiculous, but after using Talent Wizardry to gain an extremely detailed understanding of the Demonic Rat's bodily structure, then supplementing it with miraculous Spells, Isaac had ultimately managed to cobble it together.
Four hearts, four times the magic power!
Naturally, that also meant four times the blood supply...
Even with the support of Spells, a Quad-Core Demonic Rat could only last for three hours at most. After half an hour, its body would begin to collapse and its strength would weaken. After an hour, it would become completely unable to move. Without the support of Spells, that time would be even shorter!
Its peak combat capability lasted around twenty minutes.
But that was enough for Isaac, because Flesh Conversion only lasted an hour. If he wanted it to continue surviving afterward, he would need to consume even more magic power.
The ideal state was naturally to maintain it for an hour, but with Isaac's current store of knowledge, this was as far as he could go.
Still, it was actually enough. In real combat, given the Demonic Rat's strength, it would be difficult for it to survive for more than five minutes unless it was incredibly lucky and avoided all damage.
"Rip~"
A vicious Demonic Claw emerged from the back of his neck. The back of its hand brushed against Isaac's cheek, and its two sharp fingers gently pinched up the unconscious Quad-Core Heart-Swapped Rat, tossed it lightly into the air, then caught it in the palm's serrated mouth!
"Crunch~ Crunch~"
Hearing the Demonic Claw chew, Isaac's face paled before he let out a long breath.
Magic Pets truly were the greatest invention in wizarding history!
However, Isaac was not affected for long. After all, it had already swallowed quite a few. His attention was quickly drawn away by the stream of information transmitted by the Demonic Claw. This was the latest bodily structure of the Quad-Core Heart-Swapped Rat.
Isaac narrowed his eyes slightly. Just as he had predicted, there was still some room for development, but the results would not be especially noticeable. He needed to acquire more knowledge. For now...
It was time to study Blood Essence Potion.
Blood Essence Potion was a potion that strengthened one's bloodline. It was also somewhat related to Heart Replacement Surgery and could be considered its superior replacement.
After all, Heart Replacement Surgery had originally been created to allow humans to possess the power of magical creatures. The proper use of this wizardry was on humans.
Once an ordinary human had a Tier 1 demonized heart transplanted into them, their strength would be greatly enhanced in a short time, rapidly reaching the level of a Quasi-Knight!
Everyone could replace their heart a total of three times. If the demonized heart replaced each time was one tier higher than the last, then in the end, an ordinary person could become an expert comparable to a Grand Knight!
As long as the surgery succeeded, anyone could do it!
Well, that was assuming the surgery succeeded. As for the success rate of Heart Replacement Surgery...
Even Isaac, with his cheat, still had a chance of failure. That alone showed just how difficult this surgery was.
The effects of Blood Essence Potion were the same as Heart Replacement Surgery: both granted humans the power of magical creatures. The difference was that Bloodline Essence Potion granted a purer bloodline. Though its effects were not as rapid as a heart replacement, it was safer.
It also did not affect one's potential. Drinking enough of it could even increase that potential.
After generations of development, modern Blood Essence Potion could even affect the bloodlines of magical creatures. Many wizards used it to cultivate Magic Pets.
Although Magic Pets were merely companions that made studying and casting spells more convenient for most wizards, being able to make a Magic Pet stronger was naturally a good thing.
However, this also meant that Blood Essence Potion was not particularly valuable...
That did not matter. He was not relying on this to make money anyway. As long as it worked, that was enough.
He was ravenous for all magical knowledge!
"Knock, knock~"
"Young Master Isaac."
Just as Isaac was about to sit down and properly study the Spells required for brewing potions, Butler Smith knocked on the door, causing Isaac to frown slightly.
Because when he had gone out for dinner earlier, he had already instructed everyone not to disturb him unless it was something important.
But...
Though he was called a lord, he was really just a manor owner. He only had a few plots of farmland and governed a village of two or three hundred people. He could not even collect taxes; he merely did not have to pay them himself. Solomon Territory handled many matters.
"Come in."
"Young Master Isaac." After entering, Smith respectfully bowed to Isaac. When the corner of his eye caught the mottled bloodstains on the operating table, he could not help frowning slightly and sighed inwardly.
It had still come to this...
In truth, with the Solomon Family's power, although a wizard's inheritance was difficult to obtain, it was not impossible. After all, they were still a viscount's family and possessed a stable Arcanist inheritance.
The reason they had not found one for Isaac was because they feared he would stray down the wrong path. Legendary Wizards had a terrible reputation, after all, and much of their wizardry was extremely primitive and evil. Researching such things was dangerous.
But no one had expected that Isaac would actually become a Legendary Wizard with nothing more than a few miscellaneous documents...
Alas...
Thinking of this, Smith sighed heavily inwardly again, but there was nothing he could do. After all, he was only a butler.
"What happened?" Isaac asked blandly, lightly tapping on the scroll.
"Young Master Isaac, the guards discovered Goblins outside the castle today." Smith straightened up and spoke with a frown.
Isaac frowned as well upon hearing that.
Goblins were classic yet troublesome magical creatures. They had green skin, vicious faces, and stood about a meter tall. Although they were magical creatures, they were extremely weak. As long as an adult overcame their fear, they could beat several to death with a wooden stick.
But why were they considered troublesome?
Because the Goblins of this world were the creation of a Legendary Wizard. He had given them an incredibly terrifying reproductive ability. A pair of Goblins could lay dozens of Goblin eggs!
Their growth cycle was also extremely short. From hatching to full maturity took only a few days!
Moreover, according to legend, that wizard had embedded them into the laws of the world. No matter how one eradicated or guarded against them, once Goblin breeding season arrived each year, Goblins would crawl out from inexplicable places to burn, kill, plunder, and commit every evil imaginable.
If they were not stopped promptly, their numbers would explode in a short period of time!
Therefore, once traces of Goblins were discovered anywhere, they had to be cleared out immediately.
"Has it been reported to the territory?"
"It has, but the guards alone may not be able to deal with them. Should we hire a Goblin Slayer?"
"Hire one. Safety is more important." Isaac sighed. He did not know whether this expense could be reimbursed.
Guards were also called militia. They were decent enough at maintaining public order during ordinary times, but they were of little use on the battlefield, even against weak Goblins. Goblin Slayers, on the other hand, were extraordinary individuals granted special powers by a Legendary Wizard. They specialized in fighting Goblins and could gain power from killing them.
Before obtaining breathing techniques, many self-taught knights relied on killing Goblins to get through their hardest period.
When Isaac had read that record, he had suspected that those two Legendary Wizards might have been the same person!
Passing something from the left hand to the right—win-win!
Before you continue