Start in Terra, immortal

Although Hilder mediated the battle between Cain and Prey, the conflict never ceased as the Demon Realm wandered the universe.

The first to break the peace was a Shadow Clan member who called himself Kaecilius.

According to him, his planet, Aiken, is a land of perpetual war, and the people of the entire planet are bloodthirsty. He sensed the fighting spirit of a powerful being in the Demon Realm, which is why he disregarded everything and went up to the Demon Realm.

The moment Casillas stepped into the Demon Realm, he sensed several exceptionally powerful battle auras.

"Hahaha! Excellent! This fighting spirit! No doubt about it! It's definitely from a powerful figure! A powerful being who can give me a satisfying battle!"

Just as he was about to head to challenge the nearest powerful warrior, a pressure descended upon Casillas.

The hand gripping the weapon trembled uncontrollably, while the other hand, which wanted to draw the weapon, could not get even a fraction closer.

"How...how is this possible? Where is the enemy? To immobilize me with just their aura—what incredible power!"

Casillas was drenched in cold sweat, frozen in place like a statue, his face a complex mix of emotions: memories, resentment, longing, fervor, and lingering fear, but not cowardice. After all, the cowardice within him had died along with his escape from slavery.

Soon after, Hilder brought Kahn to Casillas. Upon seeing this scene, he was taken aback, then seemed to understand something. After exchanging a few words with Kahn, he disappeared from their sight.

A while later, as Kahn and Casillas exchanged glances, the Demon Realm broke free from its connection with Aiken and flew towards the interdimensional portal in the universe.

After that, the Demon Realm repeatedly connected and disconnected from various planets, and each time, certain beings would either actively or passively ascend to the Demon Realm.

These beings are all coveting something from the Demon Realm.

Sirocco, who has no physical form, is like this; Anton, whose body is as large as a giant mountain, is like this; Lotus, who looks like an octopus, is like this; Luke, who is covered in a mechanical style, is like this; and the Dragon King of a certain country is like this.

There was only one exception: Dereggie, who was shrouded in black mist and resembled a large rat.

Even Rosso didn't know where Hilder had forcibly dragged it from. In Rosso's view, this creature named Dirige was essentially an aggregate of viruses, and its ability to gather together was entirely due to that one-twelfth of the virus's contribution.

"Aaaaaah!!!" Intermittent roars began to echo somewhere in the Demon Realm.

This period was incredibly agonizing for Casillas.

He could sense powerful battle auras appearing one after another in the Demon Realm, and his desire for battle grew stronger with each new powerful figure appearing.

The desire to fight relentlessly consumed his mind, but his body had already succumbed to the tyranny of the unknown powerhouse, and Casillas could only vent his frustration through constant roars.

"It must be him!"

Thinking of Kahn's earlier appearance, Casillas's eyes widened in fury.

"He seems to be full of weaknesses, but in reality, he has no flaws. Only a true master can possess such ease and control. I really want to fight him!!!"

The Demon Realm has begun its journey through the universe once again, this time heading towards its final destination – Planet Arad.

Casillas, who was standing in place as punishment, suddenly felt a lightness on his body.

"I can move again?" He stiffly drew his weapon, swung it casually, and said, "It's been a long time, freedom!"

Casillas took off with his legs 1.5 times longer than an average person's and began to sprint into the distance, heading towards the location of one of the powerful figures.

Even though he had been bound for a long time, his body, which had been constantly fighting for years, had been completely integrated with his fighting instincts. He had absolute confidence in his skills, and no matter who he was facing, he would only know who was stronger when they fought.

After a long time, the fighting stopped.

In Brooklyn, in the Demon Realm, Casillas sat before Hilder, his tone tinged with dejection: "Kahn, the Destiny... I've fought all the powerful beings currently in the Demon Realm. Even those called Apostles, I don't think they're that strong. Even without fighting 'Prey,' who dominates the skies, and 'Long-Legged Lotus,' who controls the oceans, I doubt they'd be a match for Kahn. Kahn... he's a true monster!"

Having somehow acquired some alcohol, Casillas lifted the water pouch and took a swig.

"Before him, my fighting skills and experience became utterly inadequate. Those so-called techniques were useless against Kahn's strength and stamina! His power is truly unparalleled..."

Seeing the utterly defeated Casillas, Hilder remained silent.

She hesitated whether to tell him that there was an even more terrifying being in the Demon Realm than Kahn. After a moment's thought, Hilder finally spoke: "Kahn's strength wasn't innate. He became so powerful through countless battles. You think he's hard to surpass simply because you haven't experienced enough battles. Many of those so-called strong individuals aren't actually that strong. If you want to fight truly powerful beings, you can go to Central Park and find a demon named Salmon. The summoning magic she created will be beneficial for you in battles against strong opponents."

For a battle maniac who only knows "fighting, so exciting!" all day long, emotions come and go quickly.

Thinking that there was a huge mountain to climb ahead, Casillas thought Hilder was right. Since he wasn't strong enough, he should fight and then become stronger.

He tossed aside the water bag, immediately stood up, and thought to himself, "Luckily, Central Park isn't in Brooklyn. There's no Concorde Square there, and Kahn probably isn't there either." Casillas walked towards Central Park, as Held had indicated.

"Summoning? This is a wonderful thing! Magic should be diverse and multifaceted; what kind of mage can simply manipulate elements?"

For Rosso, who desperately needed help, 'summoning magic' was the perfect solution to his immediate crisis.

In a flash, Rosso appeared directly above Salmon's residence in Central Park.

"I heard you've mastered the method of communicating with elemental spirits?" Rosso's voice suddenly entered Samon's ears.

Startled by the sudden sound, Samon slowly raised his head from the flower bushes and looked up at the sky from which the sound came.

Rosso floated down slowly and came to Samon in the flower bushes.

"Excuse me, who are you?" Salmon was somewhat surprised; it was unusual that the elves around her hadn't told her she had a visitor.

"My name is Rosso. I've heard that you can communicate with elemental spirits and form summoning contracts with other creatures. I've come to learn from you."

Rosso made no attempt to conceal his purpose; he had noticed Salmon's surprise earlier.

For the strong, that's enough to represent something.

"If it can help you, I'll teach you right away." Salmon seemed very happy; she wouldn't hesitate to help someone if she could.

"Wait a minute, no need for that. Just demonstrate how to form a contract with other creatures. We happen to have some ready-made material on its way." Rosso pointed in a certain direction.

"The elves told me it was Casillas, the Fourth Apostle!"

Salmon hesitated, having heard of Casillas's reputation.

The opponent is an extremely warlike Apostle-level being who seeks out strong opponents to fight throughout the Demon Realm, and even other Apostles.

The last time rumors about him were heard was when he went to Place de la Concorde to spar with the First Apostle, Kahn, but no one witnessed the outcome of that match.

"Did he come to me for the 'Summoning Spell' as well?" Salmon wondered.