When Leo thought of Barrier-type god-slaying tools, the first thing that came to his mind was naturally the god-slaying tool.
Among the only thirteen god-slaying tools currently in existence, one was Barrier-type, and it was also one of the four Greater god-slaying tools.
"Dimension Lost," the fourth-ranked god-slaying tool, was hailed as the strongest Barrier-type god-slaying tool.
Its ability was to infinitely spread a mist outwards from the wielder, capable of sealing all objects that entered the mist, and even sending them to another dimension.
Depending on how it was used, it could completely destroy a country, making it a very terrifying god-slaying tool.
However, Kasumigaoka Utaha's display of ability was clearly different from "Dimension Lost," and the god-slaying tool fluctuation emanating from her body had not yet reached the level of a god-slaying tool.
Therefore, her god-slaying tool was definitely not the god-slaying tool "Dimension Lost."
Aside from "Dimension Lost," the fourth-ranked Greater god-slaying tool, there was another similar type of god-slaying tool among the god-slaying tools, the twelfth-ranked god-slaying tool—"Innovate Clear."
This god-slaying tool, unlike "Dimension Lost," which was also Barrier-type, had the ability to create the wielder's ideal world in another dimension, and could even create living beings in that world.
However, the created beings could only live within the created world; it was a god-slaying tool capable of simulating the creation of a world.
This god-slaying tool was also different from the ability Kasumigaoka Utaha was displaying at this moment, so Leo also did not consider it.
So, besides these two god-slaying tools, what other powerful Barrier-type god-slaying tools were there?
Leo carefully observed Kasumigaoka Utaha's god-slaying tool ability.
The Barrier that had expanded from her body was now completely fixed, completely enveloping the surrounding space.
As soon as the Barrier opened, Leo immediately felt that the inner and outer spaces were completely isolated, and the inside of the Barrier was filled with Kasumigaoka Utaha's magic power, which displayed astonishing aggressiveness.
In just this short while, those magic powers had already displayed several attack methods: flames constantly erupting from thin air, magic bullets flying everywhere, light beams crisscrossing, and even Magic Circles appearing and disappearing within it, the power brewing inside telling Leo that he had been targeted.
This ability immediately reminded Leo of a god-slaying tool.
It was a god-slaying tool capable of setting up a Barrier in any environment and conjuring various powers within the Barrier to attack internal enemies, annihilating them.
"Create World," an extremely rare Barrier-type god-slaying tool, so rare that it surpassed even Holy Sword Creation and Demonic Sword Creation.
For several decades, no one had been observed to possess this god-slaying tool.
A similar god-slaying tool also appeared in the original work; its Forbidden Hand ability was to transfer the opponent into a Barrier created by oneself, and within the Barrier, use various illusions to crush the opponent's spirit.
Its name was "Dreamlike Curse."
The relationship between these two god-slaying tools was the same as between Holy Sword Creation and Demonic Sword Creation; they were of the same type but completely opposite god-slaying tools.
Although both were Barrier-type god-slaying tools, one used real attacks to defeat internal enemies, while the other used illusions to crush the internal spirit.
Who was stronger depended on the wielder's ability.
"No wonder she was chosen by a Rook devil chess piece; it really is a god-slaying tool suitable for a Rook's characteristics."
Leo could not hide his joy.
The Rook's characteristic was astonishing offensive and defensive power.
If the Retainer who received this devil chess piece was good at close combat, this characteristic would grant him great strength and physical resilience.
If the Retainer who received this devil chess piece was good at long-range attacks, this characteristic would enhance her offensive and defensive capabilities.
Kasumigaoka Utaha, reincarnated by this devil chess piece, would have her Barrier, created with her god-slaying tool ability, greatly enhanced.
Not only would its defensive power be significantly improved, but the power of the various attacks generated within it would also increase.
As long as she utilized this characteristic well, combined with her awakened god-slaying tool, the role Kasumigaoka Utaha could play in battle would definitely be astonishingly great.
It should be known that each devil chess piece had its own value, and the Rook's value was equivalent to five Pawn devil chess pieces, stronger than the Bishop and Knight, which were only worth three Pawn devil chess pieces.
Aside from the Queen, which was worth nine Pawn devil chess pieces, two Rook devil chess pieces were the most valuable devil chess pieces.
If someone used two Rook devil chess pieces on a single Retainer, that Retainer's potential would be equivalent to ten Pawn devil chess pieces, even more powerful than a Queen.
Therefore, Kasumigaoka Utaha, having obtained the power of the Rook, might not necessarily surpass Yukinoshita Yukino, who was a god-slaying tool wielder, but she would likely soon surpass Yuuki Asuna, who was still learning swordsmanship.
"Is this what it feels like to be reincarnated as a demon?"
Kasumigaoka Utaha looked at her hands, feeling the magic power flowing within her, with a look of novelty.
What made her even more curious was the power she unleashed; that light-film-like Barrier seemed very powerful.
"How is it? Any thoughts?"
Leo temporarily put aside his plan to study his current power and asked Kasumigaoka Utaha with a smile.
"Yes." Kasumigaoka Utaha brushed her hair back, and said, as if carried away by pride, "I feel super strong now; I could rule the world."
"Then I advise you not to trust your feelings too much," Leo said, delivering a small blow. "You're just inflated because your body is full of power. You'll know how uncomfortable it is when you're weak during the day."
Yukinoshita Yukino and Yuuki Asuna, who were nearby, immediately nodded in agreement.
As those who had experienced it, they knew exactly how Kasumigaoka Utaha felt now.
But these were all illusions; demons were nocturnal creatures and could exert their full power in the dark.
During the day, they would feel uncomfortable, not only feeling weaker than ordinary people but also fearing sunlight and often feeling sleepy.
That feeling was definitely not pleasant.
Yukinoshita Yukino had adapted now, but she still remembered it vividly, while Yuuki Asuna had only recently adapted and was even more apprehensive about it.
Mainly because they were both people who had strict demands on themselves and would not allow themselves to be too lazy.
If it were someone else, feeling so uncomfortable during the day, they would probably not hesitate to hide in the classroom and sleep, even during school, or even take a day off and lie in bed all day.
That way, they certainly wouldn't feel uncomfortable.
"What should I do now?"
Kasumigaoka Utaha, gradually calming down from the current situation, put away her demon wings and the Barrier that enveloped the entire room, while asking Leo.
"Do I also have to accept others' summons, sign contracts with them, and do demon work, just like Yukinoshita and Yuuki?"
Kasumigaoka Utaha looked eager to try.
"It's still too early," Leo said, mercilessly striking her down. "Before that, you have to complete basic tasks like distributing flyers. You'll only be allowed to do official work when the time is right."
"Then, you also need to learn how to use the demon's power and how to use the god-slaying tool within you."
"Of course, there's one more thing you need to do most right now."
Upon hearing this, Kasumigaoka Utaha quickly pressed for more information.
"What is it?"
"Moving," Leo said clearly. "From now on, you will also live in this manor."
...That night, with the assistance of Yukinoshita Yukino and Yuuki Asuna, Kasumigaoka Utaha successfully completed her move.
Like Yukinoshita Yukino before her, she had been renting a place and living alone in an apartment, the purpose being to better facilitate her creative work.
Her family was also not a prominent household like the Yukinoshita Family or the Yuuki Family, and her parents' control over her was very relaxed.
Therefore, Kasumigaoka Utaha did not need to worry about her family asking about her situation, unlike Yukinoshita Yukino and Yuuki Asuna.
She even didn't want to explain to her family what she had encountered, thinking of keeping it a secret from them to avoid making them worry.
Thus, Kasumigaoka Utaha quietly moved into Leo's manor, becoming the third... oh no, the fourth resident of this manor.
Miyamoto Musashi met Kasumigaoka Utaha in the manor after she completed her moving task and greeted her.
"Is she also your Retainer?"
Kasumigaoka Utaha narrowed her eyes, looking at him with an expression similar to Yukinoshita Yukino's earlier, the meaning quite clear: she thought he specifically targeted beautiful girls.
"I wish, but unfortunately, no."
Leo introduced Miyamoto Musashi's identity to Kasumigaoka Utaha.
When she heard that Miyamoto Musashi was a Retainer of the Demon King, Kasumigaoka Utaha didn't feel much, but when she heard that she was Miyamoto Musashi, who was hailed as the strongest swordsman in history, she was completely stunned.
"She's Miyamoto Musashi?" Kasumigaoka Utaha said, wide-eyed. "Miyamoto Musashi is a woman?!"
Sure enough, everyone who learned this truth had the same reaction.
"That doesn't matter. If you really can't accept it, you can just think of me as a wanderer who came from a distant journey." Miyamoto Musashi smiled brightly, scrutinized Kasumigaoka Utaha for a while, nodding frequently. "Another promising talent. Although she's not suitable for sword practice, a little training should get her ready for actual combat."
"I look forward to your future performance, rookie."
Leaving these words, Miyamoto Musashi waved her sleeve and left without taking a single cloud with her.
Leo, meanwhile, took the bewildered Kasumigaoka Utaha to the study, had Yukinoshita Yukino guide her in her studies, and then went straight to the basement, finding Miyamoto Musashi who had arrived there earlier.
"Shall we start right away?"
Miyamoto Musashi seemed to have been waiting for a long time, eagerly drawing her sword and asking.
Just a moment ago, the two had agreed to spar here.
"Let's begin directly."
Leo spread his three pairs of demon wings, flew into the air, stirring up the wind and clouds.
This battle was for no other reason than to find out how much stronger he had become.