Takeshi's right index and middle fingers intertwined.
"Domain Expansion; Unlimited Void."
Swoosh!
In everyone's eyes, a black sphere rapidly expanded centered on Takeshi, instantly forming a black sphere over a hundred meters in diameter.
"W-what is that?!"
Although they didn't understand it, the more unknown something was, the more dangerous it felt.
"That thing isn't going to explode, is it?"
Everyone felt lingering fear toward the spherical object released by Takeshi.
The blue sphere can attract all things, crushing them with gravity.
The red sphere can repel all things, shattering them with repulsion.
The purple sphere formed by combining the two spheres destroys everything it covers, that's how the Royal Palace disappeared.
Now, an extra-large black sphere had appeared.
If something that massive exploded, it would be enough to blow the entire Royal Capital sky-high.
"What is that?!" Carla asked, confused.
"I don't know. Takeshi only used it once when fighting Jellal, and after that, Jellal lost."
None of them knew. They hadn't seen Takeshi in this form often, and this was even the first time they had seen "Hollow Technique: Purple."
But for Takeshi to use this move now, based on their understanding of him, this was definitely a technique more dangerous than "Hollow Technique: Purple."
At this moment, inside the Domain.
Faust was stunned.
What happened? What is going on? I can't see anything, I can't feel anything—no, wait, I can see everything! I can feel everything! What in the world is happening!
"Although you are Mystogan's father, if you dare to provoke Fairy Tail, you must be prepared to pay the price."
Takeshi would not forgo punishing Faust just because he was Mystogan's father.
Everyone in Fairy Tail, as well as Mira, had genuinely faced threats to their lives. He himself might have been absorbed if not for the System.
That is why he acted so decisively, showing no mercy.
If Mystogan hadn't come, he would have completely wiped out this Kingdom. He did not want such a thing to happen again.
"In the days to come, you will forever become an idiot."
Swoosh!
The outer wall of the Domain slowly faded and vanished, and Takeshi's figure reappeared.
Rumble!
The Mechanical Dragon fell to the ground, completely motionless.
"This is..."
"Did the King... die?!"
The soldiers were now looking at the scene before them in terror.
Only ten seconds had passed from the moment the large sphere appeared until now.
Since Faust was motionless upon reappearance, it was very likely that he had been eliminated.
"Takeshi... my father..."
Mystogan didn't know the current situation.
Although his father wanted to kill him personally, he was still his father in the end.
Takeshi said, "He's not dead, but he can't really be called alive either."
"What do you mean?"
"I turned him into an idiot."
"An idiot? What kind of idiot?"
Takeshi pointed to his brain. "I mean a literal idiot."
This time, Mystogan understood.
Normally, many people treated "idiot" as an adjective, but Takeshi had turned his father into a physically literal idiot.
He knew Takeshi's recent magic must have been extremely dangerous, but he hadn't expected it to be this dangerous.
However, perhaps this was the best outcome for his father.
"Takeshi!"
Natsu and the others ran over.
Facing the army's concentrated firepower, everyone had sustained quite a few injuries. Continuing the battle might have been life-threatening, which was one reason Takeshi needed to clear the area.
"Takeshi, what nove was that just now?! It looked really awesome!" Natsu asked curiously.
Everyone else also looked at Takeshi with great curiosity, wanting to know what that move was.
"That is my Domain, Unlimited Void. It is a Domain constructed by consuming a large amount of Cursed Energy, and it is the interior of Limitless."
"Everyone pulled inside will have their brains forced to perform countless repetitive 'perceptions' and 'transmissions' in order to 'stay alive,' generating massive amounts of useless information, thereby causing the brain to lose function, leaving them standing there waiting to die."
"Only I, myself, and those I touch are unaffected."
"H-how terrifying!"
Natsu and the others were startled when they heard this.
They knew this technique was dangerous, but they never expected it to be this dangerous.
"What about the King? What happened to him?"
Takeshi said, "In 0.2 seconds, Unlimited Void can inject about half a year's worth of useless information into the brain of a life form inside the Domain, enough to paralyze a Wizard Saint level Mage for five minutes or more, and a normal person for two months."
"So just now, it was 10 seconds total. Happy, help me calculate, how long is that?" Natsu couldn't calculate it just by counting on his fingers.
Gajeel scornfully said, "Idiot. 0.2 seconds is half a year's worth of useless information, so 1 second is two and a half years of useless information."
"Ten seconds is 25 years' worth of useless information, enough to paralyze a Wizard Saint level Mage for over four hours, and a normal person for eight years."
After finishing the calculation, Gajeel's eyes involuntarily revealed a look of fear. He felt immense dread now.
If Takeshi had used this technique back during the confrontation between Fairy Tail and Phantom Lord, it would have been too terrifying.
If even a Wizard Saint level Mage would be paralyzed for four hours, wouldn't he be paralyzed for ten days or half a month?
"What?!"
Everyone was terrified when they heard this.
Paralyzing a Wizard Saint level Mage for four hours and a normal person for eight years—that was too horrifying.
Takeshi shook his head and said, "That's not how you calculate it."
Everyone thought the technique wasn't that strong and was about to sigh in relief when they heard Takeshi say.
"Unlimited Void ignores physical defense and directly attacks the brain, causing the brain to overload. If the brain damage exceeds a certain threshold, it will cause brain death."
"The brain is where our soul resides and is the central hub for using magic. If it is damaged, whether one can successfully use magic in the future is questionable."
"I'm not sure exactly how severe the long-term effects are."
"..."
Everyone's bodies trembled.
Only then did they realize they had underestimated the danger of Takeshi's magic.
This was no longer just a matter of how long they would be paralyzed, but whether they could continue being a Mage in the future.
Natsu and Wendy clearly understood how powerless they felt without magic. Reverting from a Mage back to a normal person was a horrifying experience.