The current mainstream magic system on the European continent was established by "wise men" thousands of years ago.

In this system, the elements of magic are divided into four types: wind, earth, water, and fire.

The Carlos sisters' family is dominated by water magic. Because it lives in the north all year round, close to the snow-capped mountains, and has a high latitude, it is covered by ice and snow for a lot of time every year, so it is best at ice and snow magic in the water system. Bella and Anna are the best of the younger generation, known as the "Ice Sisters".

The Medici family in the southern Apennine Peninsula focused on the study of alchemy and fire magic. In the process of alchemy, there are strict requirements for the control of flame temperature and intensity, which can be said to complement each other. Under the influence of her family since she was a child, Elena not only mastered the complex fire magic, but also achieved considerable attainments in alchemy. Her self-created "Angelic Sevenfold Bondage" won a good impression among the noble ladies of Florence.

To the east, the Habsburgs were mainly located in the middle and upper reaches of the Danube, surrounded by mountains, and were skilled in earth magic. However, the family seems to have a penchant for politics more than for magic. Almost all of the main members of the family are in high positions, and some are even the kings of a country. Like the Medici in terms of economic and trade status, the Habsburgs were in the political arena.

To the west, on the Iberian Peninsula, is home to the Segovia family, known for their spells and wind magic. Lady Isabel had somehow lost both of her legs and was now confined to a wheelchair, but thanks to her powerful knowledge of wind magic, her daily activities were barely affected, and she had no obstacles going up and down the stairs. As for spells, we'll come back to that later.

"Séance?" Elena was a little surprised, "Could it be the legendary magic that can summon the undead?"

Isabel nodded.

"The séance," the lady continued, "is a magical ritual that summons the spirits of the deceased from the other side to this shore. However, birth, old age, sickness and death are normal physiological processes of human beings, and forcibly summoning the souls of the dead is not only against the laws of nature, but also disrespectful to the deceased, making it impossible for them to rest in peace. Therefore, it is listed as a taboo."

When everyone heard this, they were a little stunned.

Although these people are all outstanding young talents from various families, after all, only Madame Isabelle, who is accustomed to seeing strong winds and waves, is not so taboo in this regard.

"Don't be so afraid." Madame comforted the frightened children in front of her, "Since it is forbidden magic, of course it is not so easy to activate. Moreover, this circle is the part that remains after use."

After hearing this, everyone breathed a sigh of relief, but they still felt palpitations.

"But," Bella asked, "where did that demon come from last night?"

"Do you mean the thing that scared that coward so much yesterday?"

"Hmm."

"If it's a demon and not a ghost, as he suggests, then it's probably the guardian spirit of this castle."

"Guardian Spirit?" Everyone said in unison.

"Huh? Don't you know?"

Several people shook their heads.

"It seems that you have some blind spots in your knowledge of spiritual objects." Madame shook her head helplessly, "The education of young people is still not in place."

In fact, these children from the eastern, southern, and northern families have received formal education since childhood, and their knowledge reserves are still quite rich. However, based on the different characteristics and expertise of each family, the corresponding direction is generally cultivated. For example, Elena's fire magic and alchemy, Holder's earth magic and political talents, and so on. However, for other fields, it is often only slightly involved, especially things like spiritual objects, which are not included in the traditional magic system, and the elders rarely even mention them.

"Do you know how long this castle has been around?" Isabel looked up at the ceiling of the cellar as if to see the shape of the entire building.

"I heard that it existed five hundred years ago." Prince Holder replied.

"Five hundred years...... But more than that." Isabel closed her eyes, as if she was reminiscing about a long time ago, "I also heard from the older generation. Valdraz Fort existed a long, long time ago, and for how long is not well documented. The reason why there is a 500-year story is that the last owner of this castle – the last head of the Valdraz family, to be exact, – died mysteriously five hundred years ago."

"Huh?" The more Elena listened, the more excited she became, and she became completely interested, "What the hell is going on?"

"Nobody knows." Madame shook her head, "Because there are no witnesses alive, and there is no written record. All it is known is that this mysterious family – with the rumored secrets of forbidden magic – disappeared overnight. It just disappeared so suddenly, and it never came out of sight again."

"That...... What about the Guardian Spirit?" Holder asked.

"Have you ever heard of such a saying in the far East? Legend has it that after an artifact is used ninety-nine times by its owner, it becomes a spirit. If it is abandoned, or left unattended for a hundred years, it will absorb the essence of heaven and earth, the aura of the world, and turn into a monster. They call this kind of monster "Fu Fujin". Ah, though, I'd rather call them guardian spirits. Perhaps, they just carry the thoughts of the utensils for their owners, so they will linger for a long time."

"So, that was supposed to be the castle's elf last night?" Elena said, "It's a pity that Duke James took it as an evil spirit and attacked it, will it ......?"

Elena didn't dare to think about it.

"Don't worry," Isabel comforted, "if it's really the castle spirit, it won't dissipate so easily. The spirit born of such an artifact will not disappear unless its prototype, the entire castle, is destroyed."

Elena was relieved.

At this time, Bella remembered the book she had borrowed from her study in the afternoon, which was also a travelogue about the East. The book describes some exotic customs and customs, as well as some ancient legends from the Far East.

"Excuse me, how much does Madame know about the magic of the East?" Bella asked.

"Oh? Miss Carlos is interested in the occult arts of the East?" Isabel's eyes lit up.

"Just a little curious."

"Well......" Madame thought for a moment, "Actually, I don't know much about it. I just heard that in the Far East, some ancient races lived. Unlike our magic system, they classify the matter in the world into five elements: wood, fire, earth, metal, and water, and divide them into two attributes, 'yin' and 'yang', according to the characteristics of things, and those who can master and control these laws are called 'onmyoji'."

Hearing this, Bella finally remembered. Uncle Márquez once mentioned that there are people in the East who are good at the "way of yin and yang", who can cast spells without using a wand, and instead use some charms and magic weapons.

"I don't know if it's more detailed. After all, I'm not an expert on this." Isabel looked at Bella apologetically.

"I'm already grateful." Bella said with a smile.