Dumbledore had already considered hiring Goku as a special Professor at Hogwarts yesterday when he was chatting with Goku.
After the fight, he became even more determined and discussed it with the school's teachers.
Wizards can cast all sorts of magic, which undoubtedly makes them powerful.
However, wizards also have a major weakness: their bodies are similar to ordinary people, at most having slightly stronger recovery abilities.
So, if a wizard fights an ordinary human with a gun, it's uncertain who would win.
It depends on whether the wizard casts magic first or the ordinary person shoots first.
This is also why the mainstream of the World consists of ordinary humans, and wizards need to hide among them, undiscovered, and abide by the International Statute of Wizarding Secrecy.
If wizards were to truly go to war with ordinary humans, facing a vast number of humans and advanced modern weapons, the outcome would be unpredictable.
Goku's physical prowess and the destructive Qi Magic he displayed yesterday could perfectly compensate for the wizards' shortcomings.
Of course, his efforts to enhance the wizards' strength were not aimed at starting a war with humans.
His goal was to deal with the persistent Voldemort, who might revive and cause trouble at any time.
He was already old and didn't have many years left to live.
Voldemort used dark magic to prolong his life and was difficult to kill; once Dumbledore died, no one would be able to restrain Voldemort.
Although Sybill predicted Harry was the savior and would eventually end Voldemort, if that were to happen, Harry would still need to be properly nurtured.
If Harry could learn Goku's abilities, the hope of completely resolving Voldemort in the future would be greatly enhanced.
In fact, if Goku were from this World, then with Goku around, there would be no need to worry about Voldemort.
In Dumbledore's opinion, even Voldemort at his peak might not be able to defeat the current Goku.
Moreover, Dumbledore would personally teach Goku magic later, leaving Voldemort with no chance of winning at all.
Unfortunately, Goku was not from this World, and he might not stay here indefinitely.
Therefore, the safest approach was to let the young wizards at the school learn Goku's power, cultivating more powerful wizards to deal with Voldemort.
As for evil methods like forcibly keeping Goku or forcibly taking his power, Dumbledore would never do such things.
He was not Voldemort; he had his own bottom line.
Even regarding the matter of resurrecting his sister, if Goku was unwilling to help, Dumbledore would not force him.
"No problem," Goku said, eating breakfast and agreeing to Dumbledore's terms without hesitation.
Grandpa Master Roshi had never forbidden them from teaching the Turtle School training methods to others.
Moreover, he had already promised to guide Harry, Ron, and Hermione in their training.
So, naturally, there was no problem at all.
"That's wonderful! I'll notify you once the schedule for your classes is set.
Regarding your salary, I'll base it on the standard for the Deans of the four Houses."
Dumbledore hadn't expected Goku to agree so readily, so he immediately finalized the arrangement.
"What is a salary?" Goku asked after finishing the food on the table.
"A salary is money, and money is very useful everywhere; it can also buy many good magical items."
Dumbledore realized Goku was too naive and didn't understand many common things.
So, in his future magic lessons, he planned to add basic knowledge to help Goku grow better.
On one hand, he genuinely liked Goku, this pure and kind child; on the other hand, helping Goku was helping himself.
The stronger Goku became, the safer he would be, and the more capable he would be of helping Dumbledore collect the Dragon Balls and summon the dragon to resurrect his sister.
According to Goku, this was the second unfamiliar place he had arrived at by sleeping; there had been another one before.
This indicated that Goku might visit many different Worlds in the future, which presented both opportunities and dangers.
If Goku were to die in some World, his sister's hope of resurrection would be gone.
"Oh, when do we start learning magic?" Goku didn't care about money; he cared about magic that could improve his strength.
Dumbledore waved his hand, signaling the house-elf to clear the plates from the table, and smiled, "We'll start learning now.
First, we need to test if you can learn magic."
According to Goku, in his World, anyone who worked hard enough could learn to use ki for combat.
But here, it was different; to learn magic, one must have Wizard Bloodline.
Ordinary people without Wizard Bloodline could never learn magic.
Because only Wizard Bloodline could produce magic power, and only with magic power could one cast magic.
However, Dumbledore thought it shouldn't be a big problem.
Based on his observations, the ki within Goku was very similar to magic power, and it was highly probable that they could be used interchangeably.
Of course, the specifics still needed to be confirmed based on the actual situation.
If it didn't work, he would have to find a way to research how to convert and use the two types of energy.
Similarly, if Goku's ki could be used as magic power to cast magic, it also meant that the magic power within wizards could be used as ki to perform techniques that ki could achieve.
"This is your wand; we'll start by testing with the simplest basic magic."
Dumbledore took out the wand he had found in Goku's luggage last night, handed it to Goku, and began to instruct him on using some of the simplest first-year spells.
First-year spells didn't require profound magical knowledge; one only needed to correctly recite the incantation step by step and properly wave the wand along the correct trajectory to cast them.
This was why some highly talented young wizards, even if they had never encountered magic before, could self-study these spells before the start of the school year.
In fact, except for a few very difficult spells, most magic could be cast as long as the standard procedure was followed.
It was just that some had stricter requirements for controlling magic power output.
Learning and mastering the corresponding magic principles, on the other hand, was for better control of magic.
For example, the most basic Fire-Making Spell, 'Incendio,' when cast according to the standard method, would produce a palm-sized Fire.
But if one had a deep understanding of its principles, not only could the size of the Fire be changed, but its temperature could also be enhanced.
One could even extend and create new spells similar to Fire snakes or Fire ropes.
His own creation, 'Fiendfyre,' was a more powerful Fire magic extended from the basic Fire-Making Spell.
Many new magics were also created because wizards had a deeper understanding of the principles of a certain magic.
Goku was currently testing whether he could use the ki within him to substitute for magic power to cast magic, so he didn't need to understand the magic principles.
"I'll teach you the Lumos spell first; the incantation is like this... and you need to wave your wand like this..."
Following Dumbledore's instructions, Goku waved his wand and began to recite the incantation: "Lumos!"
As Goku's incantation ended, a speck of light appeared at the tip of his wand, but it quickly extinguished.
"It seems… it failed!"
Goku blinked.
"No, it didn't fail!"
Dumbledore's expression relaxed.
"Your wand movement was standard, but there was a problem with the incantation; the beginning should be slower, and the end should be faster.
Repeat after me: Lum… os… Maxima."
Just now, Goku's wand lit up, and although it was fleeting, it proved that Ki could be used as magic.
The reason it didn't fully succeed was entirely because Goku's casting process wasn't standard enough.
"Lum… os… Maxima!"
Following Dumbledore's guidance, Goku once again chanted the spell and waved his wand.
This time, a stable light source successfully appeared at the tip of his wand, illuminating the surroundings.
"Wow, it's bright, it's bright, it's bright!"
Goku excitedly waved his wand, and the light source at its tip moved with it.
After the Wand-Lighting Charm's duration ended, he suddenly thought of something and asked Dumbledore:
"If I don't have this stick, will I be unable to cast magic anymore?"
Always carrying a small stick during combat would be inconvenient for him, and if close-quarters fighting became intense, the small stick could easily break.
This small stick was not like the Power Pole; it wasn't that sturdy.
"Currently, that is the case, but once you master more magic in the future and have an in-depth understanding of magic, you can also cast spells without a wand.
It's just that the power of the magic will be slightly weaker, which is unavoidable."
Dumbledore nodded.
For wizards, a wand is not a burden but the best auxiliary tool for casting magic.
In the Middle Ages, when wands were not yet widespread, many wizards were caught and burned by muggles because they lacked wand assistance, making their casting speed too slow and their power too weak.
Moreover, wizards always cast spells from a distance, so holding a wand wouldn't be too inconvenient.
However, according to Goku's fist-to-flesh fighting style, it would be more troublesome; one could only say that he would have to slowly learn wandless casting in the future.
But as soon as he finished speaking, his eyes widened suddenly.
"How is that possible!"
It turned out that while asking the question, Goku had tried putting down his wand and using his finger to cast the Wand-Lighting Charm again.
As he finished the incantation, a somewhat dim light source appeared on his finger.
Although it wasn't as bright as the light source cast with a wand, it was indeed successfully cast.
"This is still more convenient."
Shaking the light source in his hand, Goku's face showed a satisfied smile.
Being able to cast magic without a wand would better complement his fighting style.
"Goku, cast it a few more times."
Dumbledore had Goku cast the Wand-Lighting Charm a few more times and gradually found the reason why Goku could cast wandlessly.
The main functions of a wand are to stabilize magic output and amplify magic power.
Many wizards are unable to master wandless casting techniques precisely because they cannot control the magic within their bodies very well.
A wizard's magic is innate, unstable, and easily influenced by emotions.
Many wizards born into pure-blood families, even if they were exposed to magic from a young age, could only learn magic after enrolling at eleven years old.
Because before then, the magic within their bodies was quite unstable.
Young wizards often involuntarily released magic, causing many strange things to happen around them.
However, Goku's Ki was different; it was a power condensed through arduous training and acquired through countless trials.
With Goku's talent, he could almost perfectly control his Ki, and there would be no unstable Ki situations.
Therefore, as long as he stably outputted Ki according to the standard casting method, he could successfully cast magic.
It's just that its power would be somewhat less compared to casting with a wand.
"Next, we will learn the Levitation Charm; this spell is much more difficult, especially the rhythm of the incantation is hard to grasp…"
Having figured out why Goku could cast wandlessly, Dumbledore no longer dwelled on it and continued to guide Goku in learning the most basic first-year magic.
Goku's wandless casting was a unique situation that only he could use.
Thus, with one teaching and one learning, time quickly arrived at noon.
"What terrifying learning ability!"
Watching Goku eat the hearty lunch brought by the house-elves, Dumbledore couldn't help but exclaim.
In just half a day, Goku had learned all the spells taught in the first year.
Although first-year spells are very simple, even a genius would take at least half a month of practice to master them without delving into their principles.
He himself had spent a week back then; Goku only took half a day.
He summarized two reasons for this.
First, Goku had a strong control over the Ki within his body, which greatly enhanced the success rate of casting magic.
Second, Goku had an exceptionally high talent for wand movements; essentially, if he performed an action once, Goku could accurately replicate it.
As for learning incantations, it was somewhat less impressive compared to the first two points, but still above average.
In the afternoon, magic learning continued.
But this time, Dumbledore did not teach new spells but instead explained the theoretical knowledge of magic.
He didn't plan to teach magic History, Potions, Herbology, Astronomy, or Care of Magical Creatures.
Because, in his opinion, these wouldn't significantly improve Goku's strength in the short term.
However, the principles of magic, which involved learning and mastering more advanced magic in the future, still needed to be studied thoroughly.
If Goku later became interested in those other subjects, it wouldn't be too late for him to teach them then.
An afternoon of magic theory teaching gave Dumbledore a massive headache.
"Slowly… slowly…"
After the afternoon class ended, Dumbledore could only comfort himself this way.
Compared to the unprecedented magical talent Goku displayed while learning spells in the morning, the magic theory in the afternoon was a disaster.
It wasn't that Goku's learning ability was poor, but rather that his foundation was too weak.
Goku had never attended school since childhood; at first, he couldn't even count properly, thinking that fourteen came after eleven.
Later, he became Master Roshi's disciple and learned a bit of academic knowledge.
But during a year of training, most of the time was spent on martial arts training, and the daily cultural class time was not long.
Goku's level was at most that of a first-grade elementary school student.
The key was also that he had lived in the mountains before and was overly naive, not knowing many common-sense facts.
For Goku at this level to learn complex magic theory, even the magic theory of a first-year curriculum, it was extremely difficult.
Fortunately, Dumbledore, as the most powerful and versatile wizard, had extensive teaching experience.
And with one-on-one guidance, he barely managed to get Goku started on magic theory.