Steadfast Wizard: From Heart-Swapping Rat to Dimensional Demon God

The next morning, a beam of golden sunlight shone through the window adorned with simple paper-cut decorations and fell on Isaac's smiling face, making it appear exceptionally radiant.

Looking at the mutated rat on the operating table, which had grown two sizes larger, its bulging muscles and sharp claws proved that it had already undergone a complete transformation!

This is the result of Isaac's all-night gaming session - a quad-core powered mutated mouse!

Quad-core, which means four hearts!

It sounds absurd, but after gaining an extremely detailed understanding of the mutated rat's body structure through his innate sorcery, and with the help of magical spells, Isaac eventually managed to create it.

Four hearts, four times the magic!

Of course, this also means four times the blood supply...

Even with the added effect of the magic spell, the four-core demon rat can only maintain its power for a maximum of three hours. After half an hour, its body will begin to collapse and its strength will weaken. After an hour, it will be completely unable to move. Without the magic spell, the time will be even shorter!

The optimal combat effectiveness is around twenty minutes.

However, this was enough for Isaac, because the flesh-and-blood transformation only lasted for one hour, and more magic power would be needed to keep it alive afterward.

Ideally, this could be maintained for an hour, but with Isaac's current knowledge, that's all he can do.

However, that's enough. In a real battle, with the power of the demon rat, it's difficult to survive for more than five minutes unless you're extremely lucky and manage to avoid all damage.

"Rip!"

A hideous claw emerged from the back of Isaac's neck, the back of its hand rubbed against Isaac's cheek, two sharp fingers gently pinched the unconscious quad-core heart-transplant rat, tossed it gently up, and then it fell into the palm of its large, serrated mouth!

"Crunch~ Crunch~"

Hearing the chewing sounds of the devil's claws, Isaac's face turned pale, then he let out a long sigh of relief.

Familiars are truly the greatest invention in the history of wizarding!

However, Isaac was not affected for long. After all, he had already swallowed quite a lot. His attention was quickly diverted to the information flow from the demonic claw, which showed the latest body structure of the quad-core heart-transplant rat.

Isaac narrowed his eyes slightly. Just as he had predicted, although there was still room for development, the effects wouldn't be very noticeable. He needed to acquire more knowledge; for now…

I should probably start researching Blood Essence Potions.

Bloodline Essence is a potion that enhances bloodlines and is related to heart transplant surgery, serving as a superior alternative.

After all, the original purpose of heart transplant surgery was to allow humans to possess the power of monsters, and the correct way to use this witchcraft is to use it on humans.

After a normal human being receives a Tier 1 Demonic Heart transplant, their strength will be greatly enhanced in a short period of time, rapidly reaching the level of a quasi-knight!

Each person can have their heart replaced three times. If each replaced demonic heart is upgraded by one level, then eventually, an ordinary person can become a powerful being comparable to a great knight!

Anyone can do it if the surgery is successful!

Well, that's assuming the surgery is successful, and the success rate of a heart transplant...

Even with Isaac's current condition, there's still a possibility of failure, which shows how difficult this surgery is.

The effects of the Bloodline Essence Potion are similar to those of a heart transplant, both granting power to humans and monsters. However, the Bloodline Essence Potion grants a purer bloodline. While it doesn't work as quickly as a heart transplant, it is safer.

And it doesn't affect potential; in fact, drinking too much can even increase potential.

Through generations of research and development, the Bloodline Essence potion can now even affect the bloodline of monsters, and many wizards use it to train magical pets.

While for most wizards, a pet is simply a companion that makes learning and casting spells easier, it would be great if it could make the pet stronger.

However, this also makes bloodline essence potions not very valuable...

It doesn't matter anyway, he's not making money from this, as long as it works.

He is now ravenously thirsty for all knowledge of magic!

"Knock knock~"

"Young Master Isaac."

However, just as Isaac was about to sit down and study the spells needed to brew potions, Butler Smith knocked on the door, causing Isaac to frown slightly.

He had already told me when we went out to eat that I shouldn't bother him unless it was something important.

but……

Although he was called a lord, he was actually just a manor owner with a few plots of farmland and a village of two or three hundred people. He couldn't even collect taxes; he just didn't have to pay taxes himself. Solomon's territory was responsible for many things.

"Come in."

"Young Master Isaac." Smith bowed respectfully to Isaac as he entered. When he caught a glimpse of the bloodstains on the operating table, his brow furrowed slightly, and he sighed inwardly.

It still turned out like this...

In reality, with the Solomon family's power, while obtaining a wizarding lineage was difficult, it wasn't impossible. After all, they were viscounts, and their family had a stable lineage of arcane sorcerers.

The reason we didn't find one for Isaac was because we were worried he would go astray. After all, wizards have a very bad reputation, and many of their spells are extremely primitive and evil, so it's dangerous to study them.

But no one expected that, with just a few random books of information, young Isaac would become a legendary wizard...

"Sigh~"

Thinking of this, Smith sighed heavily again, but there was nothing he could do, after all, he was just a butler.

"What happened?" Isaac asked casually, tapping the scroll gently.

"Young Master Isaac, the guards spotted goblins outside the castle today," Smith said, standing up and frowning.

Upon hearing this, Isaac also frowned.

Goblins, a classic and troublesome magical creature, have green skin, a fierce face, and are about one meter tall. Although they are magical creatures, they are extremely weak. An adult, as long as they overcome their fear, can easily kill several of them with a wooden stick.

But why say it's difficult to deal with?

Because the goblins of this world are the creation of a legendary wizard who endowed them with an incredibly terrifying ability to reproduce; a pair of goblins can lay dozens of goblin eggs!

Moreover, the growth cycle is very short, taking only a few days from hatching to full maturity!

Moreover, according to legend, this thing has been implanted into the laws of the world by that wizard. No matter how you try to eliminate or prevent it, every year during the goblin breeding season, goblins will emerge from mysterious places, burning, killing, looting, and committing all sorts of evil deeds.

If not stopped in time, their numbers will surge in a short period of time!

Therefore, any trace of goblins discovered anywhere must be cleared out immediately.

"Has the territory been reported?"

"We've reported it, but the guards alone probably can't handle them. Should we call in a goblin slayer?"

"Please go ahead, safety is more important." Isaac sighed, wondering if this expense would be reimbursed.

Guards, also known as militia, are generally good at maintaining order, but they are not very useful on the battlefield, even when facing weak goblins. Goblin Slayers, on the other hand, are superhumans who have been granted special powers by a legendary wizard. They are skilled at fighting goblins and can gain power from killing them.

Many unorthodox knights survived their most difficult period by killing goblins before acquiring the Breathing Technique.

Upon seeing this document, Isaac suspected that the two legendary wizards might be the same person!

Transferring money from one hand to the other – a win-win situation!