As their blades clashed over and over again, Roland realized. The more times they clashed, the heavier and stronger Isaac's slashes became. It was proof that the demonic sword was steadily eating away at Isaac.

While wielding the demon sword incessantly, Roland was trying to come up with the best plan.

''It's hard on your body when you're going at it with a demon, isn't it?

Roland was in a state where he could manage to deal with Isaac's slashes, which were getting stronger and stronger. Although Isaac hadn't used black magic (Grimoire) much yet, there was no doubt that his black magic (Grimoire) had been strengthened as well.

''What's up? Are you tired already? So it was a wasted muscle after all.

Over time, Isaac's personality had even begun to change. Originally, he had bared his emotions in front of Roland, but now Isaac was different from that.

'I'm ...... sorry. I didn't understand how you guys felt. 'You're an unfit father,' Roland apologized abruptly. Roland's eyes are fixed on his child as he catches his breath.

'Too late, too late! Instead of apologizing, go back to the old days and start a proper father again! When Isaac heard the too-late apology, he uttered a heartfelt cry with tears in his eyes. After a long time, the father and son finally communicated with each other. But it was too late. No one is to blame, but many have crossed paths and now Isaac is about to become a monster.

There's no way to go backwards in time, not in a world where magic abounds. "There's no way to go backwards in time, not even in a world this full of magic. I'm sure you'll be able to find a way to make the most out of your time.

I'm sure you'll find a lot of people who are interested in this. As a father, there is only one thing Roland can do. That is to stop my child from running amok.

As Roland approached with his greatsword at the ready, Isaac released a black lightning bolt from Del Moor. Roland immediately catches the released black lightning with his Chernabog. With black magic (Grimoire) activated, Chernaborg disintegrates and disrupts the black magic (Grimoire) that it touches.

However, the black lightning could not be stopped completely by Chernaborg's magical power. The black lightning was almost unkillable in its momentum and was about to reach Roland's body as it was.

''Don't lick your father's ministry.

At the moment Roland inspired himself, the black lightning vanished in a flash. Just before it touched his body, the effect of the chaos (chios) was revealed.

''You have to be kidding me, you have to be kidding me! There's no stopping it now. ...... Let's end this kind of fight," Isaac's cry contained sadness as well as anger.

Then Isaac relaxed his body. I'm sure you'll be able to find a way to make it work. I'm sure you'll be pleased to know that I'm not the only one. The long-lasting bickering between father and son would finally end.

''?''

But Isaac quickly grabbed Del More with both hands and thrust him out in front. Del More's cutting edge was pointed straight at Roland.

For a moment, Roland was almost relieved, and then he regained his composure. Even at this point in time, the hearts of the father and son remained crossed. Roland had misunderstood the meaning of the words.

Isaac immediately began to prepare for his next attack. The energy that flooded out of Del Moa and Isaac's bodies was gathering more and more on Del Moa's cutting edge. The disastrous energy that gathered at a tremendous speed did not change in size, but concentrated into a sphere.

''Get out of my sight!

In no time, Isaac twisted Del More just as he was about to open the lock.

On cue, a pitch-black ball was released from the cut end of Del More. The black ball was released and flew straight at Roland. The trajectory that the ball followed had a similar energy tail that covered Isaac's entire body. It's like a pitch black meteor.

"Oh shit! I'm not going to be able to get rid of this guy," said Roland, who immediately cowered away from the approaching black sphere. With the demon's eyes, he was able to assess the uncommon amount of energy trapped in the black sphere.

''Damn!'' The black meteor grazed Roland's cheek. The black mage (Grigori), who was experienced in combat, was barely able to avoid it by ducking as quickly as possible with a split-second decision. That's how fast the black meteor Isaac let loose was.

''Tch,'' Isaac clicked his tongue. The black meteor earlier was a terrifying black magic (grimoire) that could kill you instantly if it hit you. It's not just a matter of time before you get to the point where you'll be able to get your hands on it.

If you don't stop it soon, it will be irreversible. ......

Now Isaac is going into the fight with the intention of killing Roland. Surely, the magic power flowing from the demon sword must be affecting his thoughts as well. If he doesn't stop the outburst, Isaac might end up hurting people indiscriminately.

''If you can stop it, go ahead and stop it! Unable to stop the runaway, Isaac pounces on Roland again and again. Now Isaac was about to become a belligerent, battle-crazed man with a few screws off his head.

'All I can do is stop you!

No matter how much the power gap opened up, Roland wasn't going to run away from the battlefield. It is his duty as a father to fight, not flee, and stop Isaac from running off. Don't let the son of a human treated as a monster become a real monster.

'Interesting!' With a maddening grin, Isaac wields Del More without a break.

The great storm that should have covered the area around him a moment ago was released from the cutting edge. It was still inside Del More.

The moment it was released from the magic sword, the black storm instantly spread over a wide area. Unlike the black meteor earlier, it wasn't something that could be avoided by writhing around.

Determined, Roland grabbed his Chernabog and greeted the coming storm.

In the blink of an eye, the black cloud reaches Roland and engulfs him. It is truly self-defeating. The great storm Roland has created has given Isaac power as a result. As an added bonus, Isaac's black magic (Grimoire), which is on the verge of becoming a demon, cannot be compared to the previous ones. Along with his physical body, the black magic (grimoire) in his magic sword has been dramatically enhanced.

Isaac's mouth relaxed. No matter how you look at it, Roland has no chance. He would be swallowed by the storm before he was disintegrated by the Chernabog, and Roland would have been choked out long ago.

Just when he was sure of victory, a sharp pain shot through Isaac's side. He looked down towards the pain and saw two cuts carved parallel to each other.

'I told you, ...... don't lick your father.'

Isaac shifted his gaze to the direction of the voice, and there was Roland, breathing hard. He swung the two blades of his Chernabog in parallel, wounding Isaac.

Roland just barely drowned out the storm only around himself and appeared in front of Isaac's eyes. It was evident from the way he was hyperventilating.

There was no way to stop Isaac other than to injure him. That was the conclusion Roland had arrived at. The only way to stop the runaway was to stop its body from moving.

But Del More's power was far beyond Roland's imagination. The black patterns floating around his body moved towards the two parallel cuts. The strange black patterns that swirled around and covered the wounds as they were.

After a while, a new black spiral was drawn, and the wound that should have been there disappeared cleanly and completely.

It's not just a matter of time before you get to the point where you'll be able to get your hands on it. It's not just a matter of time before you're able to get your hands on a new one.

Almost at the same time as Isaac smiled coldly, this time Roland's body felt an intense pain.

When Roland looked down, he saw that a large cut had formed from his side to his shoulder.

The raised Del More blade slashed through Roland's body. Unlike Isaac, Roland's wound did not close up.

This is the extent of the wound. That's how you think you've won...⁉︎ I'll stop you, even if I have to pay for my life! Roland is excited.

'I wonder how long I can say that!

An epic clash of blades that begins again. They clash with each other, playing a variety of tones and not giving up a single step.

After a few minutes of clashing their blades, Roland's blade finally reaches Isaac.

'What happened⁉︎' Isaac thought he had indeed caught Chernaborg, but he couldn't prevent the blade.

Chernaborg pierced through one right shoulder and one in the abdomen. Knowing that the wounds would soon heal, Roland stabbed the blades mercilessly. The blade, which had been stabbed deep enough to pierce through the body, was not easy to remove. With this, Isaac's movements could be blocked as much as possible.

''Even I'm using black magic (Grimoire).

The truth was in Roland's black magic (Grimoire). The power of chaos (chiasmus) hidden in the Chernaborg had disrupted the magical energy in the air, distorting Isaac's vision.

This meant that Isaac couldn't catch the exact location of the approaching Chernaborg.

It's a very good idea to have a good idea of what you're looking for, but you can't go wrong with it.

No, no one else can stop me!

Isaac smiled madly and black patterns began to swirl around the two wounds as before. With his incredible magical powers, Isaac quickly healed the wounds. To keep him from doing so, Roland never let go of the stabbing Chernabog. As long as the blade was stuck in it, the open wound would not be closed.

However, the black vortex began to move beyond Roland's expectations.

The black pattern ran down Chernaborg's sword blade and reached Roland's body directly. In the blink of an eye, the black pattern spread over Roland's half of his body.

''This is ...... an incredibly disgusting feeling.

A strange sensation hit Roland. The black pattern continued to move strangely and began to swirl around Roland's right shoulder and then his abdomen. It was the exact same place where Isaac had been wounded.

When the black swirl quickly disappeared, there was the same wound that was on Isaac's body. Even though he wasn't cut, there was indeed a wound there.

''Ggh,'' Roland let out a voice full of pain.

He looked at Isaac's body and before he knew it, Chernaborg had been pulled out and the wound that should have been there was suddenly gone.

The next step in the healing process is the grafting of the wound. Del More was a far more fearsome magic sword than Roland had thought.

Then, without words, Isaac added more slashes.

Roland, deeply wounded, fell to his knees on Ursula unbearably. Even the mighty Roland could no longer stand.

Isaac's face floating in the air has no expression whatsoever, and he looks down at Roland with empty eyes.

''Hehe ...... finally stopped. I'm sure you'll be able to find a way to make the most of your time in the world," said Roland with a smile of strength as he endured the pain of his wounds.

A moment later, the black whirlpool that had been floating around Isaac's entire body disappeared and the light finally returned to Isaac's eyes.

'...... dad?' The black vortex is gone, and Isaac is no longer smiling madly. When he regained his senses, Isaac's face contorted and he ran to his father.

Even when Isaac returned to normal, the scars left on Roland didn't disappear.

'What is this ...... what am I doing in my ministry?' Isaac's face instantly turned pale as he regained his composure. Although they had been bickering about it a lot, Isaac didn't want to hurt Roland.

It's a good thing that you're not going to have to worry about this ...... punishment for not being a good father," Roland looked straight into Isaac's eyes, his face contorted in pain. As a father, Roland had succeeded in stopping Isaac's outbursts. He was also prepared to suffer wounds as a result.

'Yes, there has to be a recovery potion,' Isaac reached into his pocket and searched for the recovery potion he was supposed to have. After a desperate search, the recovery potion was in the pocket of his yellow jacket, which had sunk into the sea.

'It's okay, don't worry about it. I'm going to get through this kind of pain," he said. Don't bother me.

Roland tries to play the part of a strong father, but his smile is twisted.

Despite his father's wishes, Isaac's fears are only growing. Roland's bleeding is no less. Even though Roland is a strong man, the worst thing that could happen to him is that he could lose his life if left unattended.

Fearing for his father, Isaac quickly jumped on top of Del Moor, holding Roland's shoulder. Even though he was told to leave him alone, Isaac couldn't leave his dying father alone.

'I told you not to do anything unnecessary: ......

'Just shut the fuck up, old man,' said Isaac, no longer intending to do Roland any favors.

Del Moor, with Isaac and Roland in tow, flew toward land.

'So you've been taken in for a father-son fight,'

Ursula watched the magic sword, which was getting smaller and smaller, from the sea.