As for why the Four Symbols Seal was classified as a forbidden technique and placed in the sealing scroll alongside techniques like Edo Tensei and the Eight Gates.
This is because the Four Symbols Seal itself is perfectly safe when used normally, but if one uses the two techniques derived from it, death is inevitable.
With slight adjustments, the Four Symbols Seal can be turned into two other techniques: one is the Soul Reaper Seal, which can summon the Shinigami to drag both the enemy's soul and one's own soul into the Shinigami's stomach for sealing.
The other is the Reverse Four Symbols Seal, which requires one's own life as the price; upon activation, it uses all the blood in one's body to seal all life within a hundred-meter radius and drag them into the afterlife.
The true Four Symbols Seal and the double-layered Eight Trigrams Seal are actually not dangerous at all; they are simply very powerful Sealing Technique.
"Teacher, thank you!"
Credence could clearly feel that the violent Obscurus, which had always wanted to take over his thoughts and sanity, was now sealed away somewhere in his body, unable to interfere with him any longer.
Now he could continue to draw upon the powerful magic of the Obscurus without worrying about losing control.
Therefore, he was truly very grateful to Li Chuan for everything he had done for him.
During this time, he had been constantly reading and learning magic; he had come to understand things about the Obscurus, his own body, and his lifespan.
He felt that if there was anyone in this life worth risking his life for, it was not the parents who had abandoned him and whom he had never met, but Li Chuan, who had saved him from the darkness, taught him magic, and given him a new life.
"Continue your studies. Your potential is very high, and you will surely become a very powerful wizard in the future!"
Li Chuan patted Credence on the shoulder to encourage him, then let him continue going downstairs to study magic.
Although the time he had spent learning magic was short, Credence was gifted, and combined with the massive magic of the Obscurus within him, even now, the power of the magic he cast was not inferior to some ordinary Aurors.
After studying hard for a while longer, his strength would definitely be considered top-tier, and he would be able to become a good helper.
"It is time to pay Dumbledore a visit!"
Asking Bari to take good care of Credence and Voldemort at home, Li Chuan disappeared from the spot with an Apparition.
He only had five months, and he needed to learn sufficiently powerful area-of-effect magic from Dumbledore and Grindelwald within this timeframe.
Because the Wizard Bloodline does not suffer from magic exhaustion, large-scale offensive magic, while not as damaging as a single-target Curse of Slaying, could handle large numbers of cannon fodder.
In fact, Dumbledore had previously wanted to meet him through Newt, but he had found an excuse to decline for the time being.
At that time, he had not yet practiced Occlumency well enough and was worried about Dumbledore spotting any flaws.
Now, after his time in the Main World and the Naruto World, his Occlumency had reached a fairly good level, so he no longer needed to worry about Dumbledore's Mind Reading.
Likewise, his strength had improved significantly; at the very least, even if he were exposed in front of Dumbledore, he had enough confidence to handle it.
"Ding-dong!"
In front of Newt's cottage, Li Chuan rang the doorbell.
A moment later, a woman wearing a long yellow skirt opened the door:
"Good morning, Mr. Foley."
"Good morning, Ms. Bunty. Is Newt home right now?"
Li Chuan walked into the house with a smile and asked.
The woman named Bunty was a Witch hired by Newt to specifically help take care of magical creatures.
In the wizarding world, apart from a few pure-blood families with long histories, most wizards did not have house-elves to serve them at home.
Moreover, not every wizard could find a good job after graduation; servants, shop assistants, cleaners, and even wizards so poor they couldn't afford to eat were everywhere.
It could be said that the living standard of many wizards was not even as high as that of Muggles.
The main reason for this phenomenon was the International Statute of Secrecy; wizards could not use magic in front of Muggles, and naturally could not use the convenience of magic to gain benefits.
In fact, if wizards could use magic in Muggle society, even if they were doing poorly, they could earn substantial rewards and live a relatively luxurious life by using various magical means to assist their work.
Look at a powerful wizard like Lupin; because he was a werewolf, he was discriminated against and could never find a suitable job in the wizarding society, and even the clothes he wore were very shabby.
If there was no Statute of Secrecy, even if he just disguised himself as a magician, he could have lived quite comfortably.
"Mr. Newt is downstairs feeding the Water Horses."
Bunty pointed to the Underground Room at the bottom of the stairs.
Li Chuan nodded and then walked down the stairs toward the Underground Room.
Many houses in London had Underground Rooms, or cellars, which were more appropriate, mainly used to store wine, non-perishable canned food, toilet paper, and other miscellaneous items.
And Newt's Underground Room had clearly been modified by him using the Undetectable Extension Charm; the actual area of the entire Underground Room was even more exaggerated than his suitcase.
It wasn't just a simple floor of a few dozen square meters, but divided into several layers, with dense forest areas, snowy areas, desert areas, lake areas, and so on.
Sometimes Li Chuan felt that he had learned the Undetectable Extension Charm quite well, but compared to Newt, the gap was truly not small.
Then again, his main energy was focused on various powerful Dark Arts, while Newt had spent decades studying the Undetectable Extension Charm, wanting to provide a home for magical creatures.
Of course, strictly speaking, Newt's behavior also violated the laws of the Ministry of Magic, because the Ministry of Magic explicitly stipulated that personal items could not have the Undetectable Extension Charm cast on them.
However, firstly, no Ministry of Magic personnel would come to specifically inspect it, and secondly, Newt was never a rule-abiding wizard.
Moreover, most wizards did this privately; as long as they weren't caught red-handed by the Ministry of Magic Aurors, it wouldn't be too serious even if they were caught—just paying a fine and getting a warning would pass.
Following the stairs to the lake area, Li Chuan soon saw Newt riding a Water Horses, soaring into the sky from the lake and then quickly falling back down.
Water Horses were a type of magical creature capable of various transformations, appearing mostly in the form of a horse, draped with broadleaf cattail grass acting as a mane.
They liked to lure humans to ride on their backs, then drag them into the water to drown and eat them, making them quite ferocious magical creatures.
However, because their manes could be used to create wand cores, they were heavily hunted by wizards, and now their numbers had become very scarce; Newt was trying to find ways to help them.
The largest known Water Horses at present was the Loch Ness Monster located in Scotland.
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