Laplace raised his arm and chanted a few incantations, and blue light flashed, and a vivid picture of the main star of Destiny appeared in the room.

"Those lines that surround the main star of fate are called the trajectory of fate, and it is the bright part that represents the fate that has happened, the traces of the flow of the main star of fate, that is, the history, the determinable part. ”

Laplace pointed to the model of the main star of fate and gave Constantine a lecture on the basics of astrology.

"And the dim lines that lead to the fog of fate, the possibilities of the future, are the uncertain part." ”

"The different nature of the two trajectories of destiny laid the cornerstone for the study of astrology, and in these two natures, the predecessors of the Hospita explored the two major directions of development of astrology, as well as the two major schools of astrology, one is retrospective and the other is prophecy. ”

Constantine was not the kind of student who only knew the knowledge of rigid memory, and after listening to Laplace's argument, he pondered for a while, "Master, does the so-called retrospection mean that astrologers can observe past history from the trajectory of fate, and prophecy refers to the astrologer's prediction of what will happen in the future with the help of the trajectory of fate?"

Laplace nodded approvingly, "Your understanding is very good, and that's exactly what happened. ”

"In astrology, the two processes of 'backtracking' and 'prophecy' are collectively referred to as observations. ”

"The fragment of information obtained from an observation is called the observation value or observation density, which can be expressed by numbers or magic symbols, multiplied by the range of the observation time, that is, the distance between the time node of the observer himself and the time node of the observation fact, and the final result is the total amount of observations. ”

These three values form the first law of modern astrology: the total amount of observations formula. ”

Laplace stretched out his finger and gently sketched it in the air, and three dark blue symbols full of mystical meaning appeared in Constantine's eyes, forming the most concise equation, exuding a mysterious brilliance.

The moment the three magic symbols appeared, Constantine felt as if the door to a new world was slowly opening in front of him.

"The more gifted astrologers are, the longer and denser they can observe, and correspondingly, according to the formula just mentioned, the greater the total number of observations, which is understandable. ”

Constantine nodded.

"Let's take the simplest example. Laplace reached out, and a small fireball appeared on his fingertips.

"This fireball was summoned by me with a spell, and now, I want to know how long it took for it to form, and when I use astrology to retrace the past, the sight of the fireball from its inception to its formation immediately comes to my mind. ”

"If I define the density of observations in this picture as one, and then based on the trajectory of fate, I can get the information that the total number of observations at the beginning and the total number of observations at the end are 0.09 and 0.075, respectively, then how much time did it take from the convergence of the fire element to the full formation of the fireball? Also, assuming that you didn't directly observe my spell casting just now, could you please judge whether I used the Magic Technique?"

Constantine replied without hesitation, "According to the formula, it can be inferred that the length of time for the observation phenomenon to occur is equal to the difference between the initial and final values of the total number of observations, so the cast time of this fireball is 0.015 seconds, which is nearly a hundred times less than the time it takes to chant the standard spell of the fireball technique. ”

"You see, that's the beauty of astrology. Laplace blinked. "Using the trajectory of fate to observe the past, starting from the data obtained, and distilling the information we want, is one of the most important abilities of an astrologer – backtracking. ”

Constantine was thoughtful.

But this is just the simplest example of backtracking, and the reality is much more complex and abstract than that. ”

"For example, in many cases, due to the limitations of the laws of the plane, the density of observations and the total amount of observations that we obtain cannot be expressed in terms of the natural numbers we are familiar with, and in more complex cases, the calculation of the total number of observations requires the help of quite advanced mathematical tools. ”

Laplace said, "For example, if the object you observe is in a different plane from yours, and your mental power does not reach the legendary realm, then the range of observation time cannot be calculated, because as we all know, the speed of time flow between planes is not the same, and it is impossible to synchronize, at this time, your backtracking and prediction will be extremely wrong." ”

"And when you're trying to predict something that involves multiple planes, the error can be so big that you can't make any accurate observations. ”

"Even the formula I just mentioned is based only on the continuity of the trajectory of fate itself. ”

Laplace said calmly, "But sometimes, due to some special reasons, the trajectory of fate will be broken, and the formula for the total amount of observations just mentioned cannot be established. ”

Constantine was stunned, he really didn't think about these questions, and couldn't help but fall into deep thought for a while.

Laplace did not intend to let Constantine spend a long time pondering these difficult questions.

"And about these questions, the astrologers of the Hoshimi Tower have conducted detailed explorations, and their research results are kept in this crystal tablet, and all you need to do is absorb their knowledge. ”

Laplace stretched out his hand.

The crystal slab of the central platform instantly lit up, and in an instant, dazzling starlight shone from the dome.

In the starlight, a huge curtain of light that stretched straight into the sky slowly rose.

In the snow-white light curtain, you can faintly see dense equations composed of words, symbols and numbers, as well as countless strange geometric figures.

They are like rising dust in a vast nebula, forming an incomparably magnificent and magnificent picture.

A picture of the starry sky and dust.

Constantine stared at the curtain of light in distraction, and at this moment, the impact on the vision and mind was incomparable.

It is the culmination of a lifetime of wisdom condensed by the astrologers of the Hosibi Tower.

"That's not all there is to astrology, it's just about the backtracking part. ”

Laplace's voice rang in his ears, "If I want to put all the information on display and present it in this room, then I have to reduce the equation to the point where it is invisible to the naked eye, and there is no need for that right now." ”

"And in the remaining part of the prophecy spell, it involves the ultimate realm of astrology--- part of the [Great Prophecy], which allows you to have the power to change the trajectory of your destiny in a small area. ”

"I didn't understand the meaning until I stepped into the realm of legends"

The old astrologer looked up and said. "However, I am convinced that the end of great prophecy does not end there, and that the end of astrology is the power that can change the fate of the entire plane, and that is the power that surpasses all magic. ”

From the vicissitudes of the old astrologer's words, Constantine heard an infinite longing.

But then, he coughed again, "Master, do you think I'll be able to read them all in my lifetime?"

"You can. Laplace said firmly.

"Why?" asked Constantine, "is this also the result of your astrological predictions?"

"No, it's just my gut feeling. Laplace looked at him with a smile. "If you're ready, you can get started now. ”

Constantine took a deep breath, stood up, walked over to the huge curtain of light, and concentrated his full attention.

In the spiritual sea, his real name, Odin, emerged.

At the same time, his eyes turned a bottomless blue, and in the light curtain, countless symbols, words, and formulas jumped out of the projection, converging into a vast torrent of information that rushed directly into his retina.

Inheriting all the knowledge of dozens of great astrologers of the previous generation on his own is an incredible thing for a crown mage.

Changing to an ordinary magician, even a great mage, the spirit world can't withstand the impact of such a terrifying torrent of information, and it will be hit hard in an instant, and even become an idiot.

But Constantine did it, because on the altar left by Faust, he had already had a similar experience, and was naturally unmoved.

What's more, he has now fused part of Odin's soul.

Therefore, when the torrent of knowledge rushed into his brain, the pain that Constantine had expected did not come, but felt very relaxed, and even a strange pleasure.

What surprised him even more was that with the influx of more and more astrological knowledge, this pleasure became stronger and stronger, stimulating him to read further, scanking through the information on the light curtain at an astonishing speed.

In the depths of his soul, countless memory fragments that originally belonged to Odin were lit up one by one, making Constantine read faster and faster, and he could memorize everything almost at a glance.

Moreover, in this process, Constantine did not pause at all, and all knowledge was immediately understood and absorbed by his brain as soon as it appeared in his field of vision.

The experience was wonderful.

Constantine suddenly had the feeling that this knowledge had been imprinted in his mind for a long time, and now it was just an opportunity to review it again.

......