The location was an abandoned factory somewhere in the city.
The entire Gremory household visited this place. As the one in charge of a city, Rias naturally wouldn't always rely on the help of others.
Most of the time, the strong-willed girl would always lead her household alone to exterminate intruders.
Arthas also knew the girl's pride, so he chose not to interfere. After all, if he took action, there would be no suspense.
However, since this involved the Khaos Brigade, he naturally couldn't turn a blind eye.
As the sun set, the sky gradually darkened. Several presences existed within the dimly lit factory, filled with killing intent and hostility.
"The Gremory household, huh? You have a good nose."
A man wearing a black coat appeared from the darkness. Several humanoid black figures stirred restlessly around the man.
There were no less than 20 of them. There were probably a hundred black humanoid monsters in this narrow factory.
Rias stepped forward and asked in a cold voice.
"Are you from the 'Khaos Brigade' - the Hero Faction? Greetings, I am Rias Gremory. I am a High-Class Devil appointed by the Three Great Factions to manage this city."
Hearing the President's greeting, the man curled his lips.
"Ah, I already know that. The Devil King's sister. Because our purpose is to purify you devils and save the city."
The man looked at Rias and the others with the eyes one would use to look at trash.
Although the 'Khaos Brigade' had been silent for a long time, it seemed that their purpose remained unchanged.
Recently, small groups of the Hero Faction had been launching attacks on this city.
It should be said that important strongholds of various factions had been successively attacked by members of the Hero Faction.
It was clear that these people were probing or something else. Otherwise, attacking a city with a Fallen Angel Governor-General, a Seraph, and a Devil King was an act of suicide.
However, the successive attacks had allowed Rias to have many practical combat exercises.
Two more shadows appeared from beside the man. This time, they weren't distorted figures but humans. They were a man wearing sunglasses and a man wearing unique clothing.
Looking back at the distorted figures, they were basically cannon fodder. The Hero Faction seemed to be using them as a unit.
But even if they were called cannon fodder, their individual strength was so strong that even Low-Class Devils couldn't handle them.
"Is this all they've got? These aren't even worth calling cannon fodder."
Originally planning to move his body that was about to rust, Arthas curled his lips in disappointment after seeing the opponent's strength.
Although he looked down on them, it was still good to let Rias and the others train.
"You're that so-called strongest soldier, right? You're very famous in our group. Don't worry, the higher-ups will definitely come and deal with you personally. Our mission is just to casually kill one of you guys."
Seeming not to care about Arthas, the man showed a bloodthirsty smile to Rias and the others.
"Even if it means risking your lives, being able to kill one of them here is a great achievement. Go!"
After saying that, the man wearing the black coat emitted something like white flames from his hand.
Following the man's first attack, the hundred or so distorted monsters around him also charged towards them.
As for the two old-fashioned men who had appeared, they hid among the monsters.
"Another Sacred Gear wielder?" Rias frowned as she looked at the man playing with fire on the other side.
"Ara, the Hero Faction who come to cause trouble all seem to be Sacred Gear wielders. It seems the Khaos Brigade has gathered many such people."
Although she was a bit puzzled, Akeno still had a smiling and excited look. Being able to bully people again was the best thing for her.
"This is troubling. Lately, we've only been fighting Sacred Gear wielders." Letting out a helpless sigh, Rias's hands didn't slow down.
Crimson magical power was released, and a powerful Destruction magic bullet began to prepare.
"Ara ara, isn't destruction the best? I quite like it~" Akeno cupped her slightly flushed cheeks, and dazzling lightning gathered in her palm.
The battle process was easy. Although the opponent's Sacred Gear controlled light, a great weapon against devils, the difference in strength still allowed them to be quickly wiped out.
The output of the two former Holy Sword wielders plus the Balance Breaker of Kiba Yuuto was very terrifying.
The cat sisters, along with their sister Kuroka, who had mastered Senjutsu, and Himejima Akeno, carried out long-range fire support, so much so that the battle ended before Rias could even do much.
Although they ended the battle with a complete victory, there was a single escapee who escaped through a teleportation circle. Arthas, who could have easily stopped him, didn't stop him.
However, he finally understood the meaning of the Hero Faction's seemingly suicidal actions: to allow the combat members with Sacred Gears to reach Balance Breaker in the midst of life and death.
Hearing Arthas's analysis, Rias and the others frowned slightly.
"What a cruel tactic. What are the people of the Hero Faction thinking, using such a method of forced growth to increase the strength of their members?"
"Perhaps… they're preparing for a great war in the near future. Reaching Balance Breaker is just the minimum. If they're too weak, they might not even be considered combat power."
"A great war, huh…"
Arthas's words made Rias think of some bad things. The Khaos Brigade was, after all, a thorn in everyone's side. No one knew what this terrible organization might do.
"No matter what, this news must be told to my brother as soon as possible. Not just my brother, we also need to tell the angels and fallen angels."
After cleaning up the battlefield and hiding all the traces, Arthas and Rias returned to Kuoh Academy.
Gabriel and Azazel were in the academy. Rias first told the two about Arthas's guess, and then went non-stop to inform her brother.
As expected, after receiving this important news, all three parties took it very seriously. Azazel, Sirzechs, and Michael, after discussing for a while, also came to the same conclusion as Arthas.
The Khaos Brigade was cultivating elite combat power, and they were doing so at the cost of a great deal of blood and sacrifice.
Every Sacred Gear wielder was a valuable asset, and the Khaos Brigade's current actions were undoubtedly preparing for a desperate fight.
Whether it was Azazel, Sirzechs, or Michael, they all felt a sense of impending crisis.
They also began to prepare well among the Three Factions, taking precautions against the Khaos Brigade Hero Faction's attacks that could happen at any time.
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