"I don't know...... Isn't that the mental power and magic that is needed?" Harry asked, uncertain.

"Of course not, high-level magic does require higher magic and mental power, but that's not the key!" the old curator's face gradually became serious, "It's been tens of thousands of years since the elemental gods taught human magic, but the new magic invented by humans is all concentrated in primary and intermediate magic. Very little advanced magic has been invented, do you know why?"

Seeing Harry shake his head, the old curator said word by word, "Because, no one knows the secret of advanced magic!"

Seeing Harry's confused expression, the old curator began to explain: "You also understand both primary and intermediate magic, you must know how to mobilize the magic elements to cast these spells, and your spiritual power will personally mobilize them to form magic. ”

"Isn't that what high magic is all about?" asked Harry.

"Hehe, of course not! I'll give you an example, the magic of meteorite falling from the sky is actually a combination of earth and fire, and the amount of fire and earth elements mobilized in it is far more than 100 times that required for a level 6 magic. Harry nodded, knowing that the mana required for three magic levels was about 100 times.

"But the meteorite is only a level 8 magic! I only need to take out about 20 times the magic power of the level 6 magic to cast this magic. What do you think is the reason?"

"20 mana can mobilize a thousand times the magic element that 1 mana can mobilize, and why is that?" Harry asked hurriedly, hearing his interest.

"I don't know how the magic element works because of the magic of meteorites! I only need to release the magic through the spell, and then I can form this magic, as long as the mental power is up to the requirements, I can control this magic. As for how the power of magic is used, I don't know anything. This is also the reason why the current magic research stops at level 9 magic, because the mystery of high-level magic has not been clarified, how can they further create level 10 or even level 11 magic? In fact, there should still be a few people in the continent whose spiritual power or magic power exceeds the level of level 9, but they can still only use the highest level of level 9 magic, and there is no higher-level magic for them to use at all. ”

Harry couldn't help but secretly wonder that advanced magic was still a mystery, and no one had yet been able to solve its mysteries. Suddenly, it occurred to Harry that the magic he had created was similar to that of high-level magic, and that only required very little magic power to cast a powerful spell. However, the requirements for mental power are too high, and without such mental power as myself, I am afraid that I will not be able to do it. But high-level magic can only require 7-9 levels of spiritual power, which seems to be a bit different.

Seeing Harry thoughtful, the old curator nodded: "You have also thought that the magic you created is similar to high-level magic in terms of magic, but it is too demanding on mental power, and I am afraid that I can't master it even if it is an old man." Of course, don't get your hopes up, after all, there are so many generations of magicians who haven't completed the task, and you don't expect to solve it, you just need to try it according to your own ideas. ”

"If the meteorite you just said didn't rely on a spell, would you be able to cast it?" asked Harry.

"Hehe, this is impossible, first of all, there is nothing the old man can do if he mobilizes the fire element and the earth element at the same time. Even if two elements can be mobilized at the same time, how the fire element can be evenly distributed on the huge meteorite block, and how it can be formed in the distant sky, that is not something that ordinary spiritual power can do, and the amount of magic power required is simply unimaginable. ”

"I see, but I have some ideas, I don't know if you can give me some advice, old curator. Harry seemed to have come to his senses, and was anxious to ask the old curator for confirmation.

"Okay!

"Because of my outstanding mental power, I still don't understand how to reduce the demand for mental power, but I still have some experience in reducing the demand for magical power. Harry slowly gathered his thoughts, "The magic element itself should have its own rules, as long as you master this law, you can make the elements automatically run according to the rules to achieve the results you want." Therefore, there is no need for the caster to forcibly mobilize the magic elements to make magic step by step. Harry added in the end, this law is an automatic machine, and the input of magic can output the desired result 'magic'.

"So, you've discovered some pattern? The old curator asked eagerly.

"No, what I discovered was not the laws of the elements, but the laws of mastering some magic. Harry thought about it, physics and chemistry really can't be considered the laws of the elements.

"For example?"

"For example, tornadoes actually use a lot of wind blowing techniques to form a ring of wind pressure, and eventually form a tornado. Seeing the old curator's stunned face, he obviously didn't understand.

Harry gave a rough introduction to the principle that the wind speed and air pressure will be different, and the old curator smiled awkwardly, "How did you find out about this thing?"

"Practice makes sense!" said Harry, unashamedly.

"Hehe, now you're willing to go to the third floor to have a look, right?" and there are not only high-level magic materials on it, but also some interesting things!" the old curator smiled mysteriously.

"I'll definitely go up and see it!"

Well, it turns out that the real tornado is so powerful, but it is much more powerful than its own. Harry knew from the description in the book that a real level 7 magic tornado was more than 10 meters tall and could roll up hundreds of pounds of boulders and smash them to pieces. The tornado was only 7 or 8 meters high, and it didn't seem to spin as fast as the book described.

Casting a tornado by itself mainly relies on wind pressure to rotate itself, but a tornado with high-level magic is forcibly rotated by the wind element, so if you continue to calculate, such a tornado requires more than 10,000 times the magic power of your own? So why only need the magic power of level 7 magic to cast it? According to some knowledge of the earth, Harry irresponsibly guessed that maybe there is a certain connection between the various elements, so not every elemental mobilization requires the same magic. For example, the nine planets of the solar system and their moons, if there is no external force, it will maintain a certain balance and stable operation, if there is an external force to change the orbit or speed of a planet, then the entire planet of the solar system will change its orbit because of this, and the energy of this external force does not have to be strong enough to move every planet.

Therefore, the magic element is probably similar to this, as long as some elements are mobilized, the other elements will also be mobilized, and finally form a powerful magic, but this law must be very complicated. But I don't know what kind of magical power the elemental god who invented this magic is, and he can actually grasp the laws of it.

In addition to the introduction of some ordinary high-level magic, the book on the third floor also has many experiences of senior mages in casting high-level magic, as well as many magic secrets and the hidden history of the continent. The contents included dragons, gods, elves, human masters, etc., and Harry wrote them all down, and maybe he will use them in the future.