*Slap!*
Eiji slapped Abyss Trinity's face again. The sound of the slap echoed on the battlefield.
"This is for what you wanted to do to Lilith. Father-in-law, you're pathetic and underestimate your good son-in-law too much."
My good son-in-law?
What good son-in-law slaps his father-in-law?!
Abyss Trinity roared in his heart. But he was unable to speak because his body was locked by the Varvatos aura released by Eiji and his mind was muddled by the many memories that affected his cold heart.
He knew Eiji did something more than just slap him but what could he do?
He could only endure the feelings of anger and humiliation that welled up in his heart.
"It's not about underestimating my power of course because I know I'm a humble person. Many idiots often jump in front of me so I have to slap them to make them realize the level difference between us."
"...." Abyss Trinity.
"...." Lilith and the others.
Arata felt Eiji's words slapped him because he was also one of the idiots who had previously jumped to fight with Eiji.
To be more precise, Astral Trinity had a mental attack so he locked himself in his room and refused to go out again to see the sun.
Abyss Trinity didn't know that before him Eiji had also slapped the Magic King of this world with his power.
Still, if it wasn't about underestimating his power— then what was he underestimating?
"You don't know but I'm a pretty careful person. Before coming here, this world. I knew there was a possibility that my women would be in danger. Like someone would try to control her mind or something. So you know what? I gave each of them a necklace that can protect them from any danger including mind control magic."
"...?!"
Abyss Trinity and Arata were surprised.
Ignore Arata who recalled the bad memories of Lilith and Eiji's date yesterday where he saw the boy kiss the girl he liked and give her the necklace he meant. He felt green at that time.
Abyss Trinity was surprised that Eiji was too careful! He didn't know that boy knew exactly what happened because he knew the original work.
But Eiji also said 'before coming to this world' and 'my women'. Abyss Trinity understood why Eiji's power was so strong even though he wasn't a Magic King like himself. It must be because he also came from another world that he didn't know where exactly.
But...!
What was more important was that the boy seemed to have another girlfriend besides his daughter?!
Abyss Trinity before being slapped by Eiji's hand and the Conception spell wouldn't be so concerned about this. But now he was a little anxious about Lilith.
He was like a father who was worried about his daughter being deceived by a bastard.
*Slap!!*
This B-Boy... Can he stop slapping his father-in-law?
Just kill him!
Abyss Trinity vomited blood and had several of his teeth broken by another slap from Eiji.
Eiji did not change his expression when he saw that. He got carried away and still wanted to slap Abyss Trinity even though he could finish it right away.
The letters now shining in his eyes were Akio's Conception. Every slap he gave Abyss Trinity not only made him get Akio's past memories. He also got Abyss Trinity's memories which made him see a beautiful Lilith-like woman who looked more mature who was lonely because her husband did not understand a woman's heart.
[What a poor woman! Don't worry, I'll give Abyss Trinity a few more slaps.]
The heroines: "..."
Which woman is this again?
Even Lilith and Akio felt that Eiji wasn't talking about them.
"This is for... Right, the innocent people you've killed, father-in-law. I know before coming to this world, you destroyed your world and killed everyone there."
"You... How did you know? Never mind. You don't understand. What do you understand?! I did it for the greater good! It had to be done to destroy the Magic King System that kept creating Magic Kings every time it destroyed the world they were born into. In order to stop that infinite cycle. That's why I also had to destroy this world and kill this world's Magic King Candidate, Arata."
Abyss Trinity who realized he could speak because Eiji allowed him to say his true purpose. He thought Eiji, Lilith and the others would be surprised and change their minds a little about killing him.
But except for Arata who looked a little surprised that his senior had the same purpose as his cousin, the others did not look surprised at all.
Eiji smiled slightly.
*Slap!*
"W-Why keep slapping me?! Show a little respect for your father-in-law! After all... I have approved your relationship with my daughter."
"Oh? Thank you for that. But Lilith, do you care what your father says?"
Eiji asked the red-haired girl who was enjoying watching her boyfriend slap her father repeatedly.
It was abnormal for a girl not to be angry at seeing her father being slapped by her boyfriend.
However, Lilith's situation was special. She didn't have much affection for her father whom she had first met after many years and the things the man had done disgusted her.
This reaction is more from the original work.
Lilith shouted from a distance. "No!! I don't have an evil father like that!"
"...." Abyss Trinity felt a wave of sadness in his heart. It seemed that now his daughter didn't want to acknowledge him as her father and hated him.
But that was natural, right?
He wanted to use his own daughter as his tool.
"Besides, are you sure that by destroying all the worlds and killing the Magic King in every world in this universe the Magic King System can be destroyed?" Eiji asked and his question made Abyss Trinity almost choke on the blood in his own throat.
He looked at the boy standing in front of him with confidence.
"That's... Of course! If there are no more worlds to give birth to Magic Kings and there are no more Magic Kings left. The Magic King system will definitely break down."
"How do you know that?"
"...I thought of it myself."
[Yes I remember there was also a silly blue-haired girl who thought the same thing as you, father-in-law.]
Hijiri who was busy watching from inside the necklace blushed.
Now she felt that her previous self was too impulsive and silly.
"How are you sure it will work?"
"I don't know but-"
*Slap!!*
Abyss Trinity's head almost spun backwards and the strong wind that blew from the slap shattered the ruins beside him.
Ordinary mages would have died from receiving Eiji's slap so many times and had holes in their stomachs.
However, Abyss Trinity was still able to survive with the Magic King Element that suppressed his wounds from getting worse. Although it was only temporary but it was enough to allow him to speak and receive more slaps from his good son-in-law.
Still, why was he being slapped again...?!
Feeling his head buzzing and the pain of having his face swollen like a pig, Abyss Trinity felt it was better to die than to accept such a crazy insult like this.
His son-in-law was a demon.
What Abyss Trinity thought was not wrong. However, he would probably be scared to death if he knew Eiji only used less than 5% of his physical strength to break through his nothingness defense.
If it was more than that, Eiji wouldn't even have to bother learning the Enchant spell and getting Conception from Akio. He could instantly blast the Abyss Trinity into a mist of blood with one half-serious blow from him.
Abyss Trinity was lucky to have the beautiful and long-legged Akio there which made Eiji interested in using this opportunity to seduce her.
[As expected of my host.]
Was that a compliment or an insult to him?
Eiji was sure Miss System was complimenting him.
"Are you an idiot? In the end it was just a crazy idea from a mope."
"M-mope? Who do you think you're talking to? I'm the Magic King!"
"Other than your wife who gave birth to Lilith. Do you have any friends?"
"...I don't."
"Do you often go out to have fun with your wife?"
"I don't..."
"Seriously? What did you do before destroying your own world?"
"Studying magic and..."
Abyss Trinity didn't remember many of the things he had done. He remembered he had a wife and someone talked to him once but that was it.
A few slaps from Eiji earlier stirred his memories to the point that Abyss Trinity was tempted to ask the boy to slap him more.
However, how could he possibly say that? He was not a masochist!
"That's it? You're a mope."
"Noisy! No matter what, I'm sure my idea will work!"
Abyss Trinity roared, he managed to gather another 10% of his Magic King Element during that conversation. He grinned wickedly, and controlled Caina who was lying quite far away from him since Eiji had hit him in the stomach.
Although Eiji was very strong would he still be fine being stabbed by the Magic King Weapon?
At this moment, Caina who was behind Eiji suddenly flew towards his back with the blade burning with black flames and the Magic King Element centered on one attack.
"Eiji!!"
Lilith, Akio and the other women except Lugh who only frowned shouted anxiously.
However, Eiji was very calm. It seemed that his father-in-law could not repent with just a few slaps. He really had to...
*Clang!*
"No way! Even Caina wasn't able to hurt you who didn't use the magic barrier? How? Y-You're not human!"
The women who had just cried out in dismay were relieved. Arata looked a little disappointed as he felt it was getting harder and harder for him to catch up to the level Eiji had reached.
At this moment, Caina which was a Magic King Weapon like Judecca failed as if it had hit a very strong wall when it hit Eiji's back.
Eiji was not injured at all and he did not bother to get rid of Caina as the sword was immediately thrown back to the back. He extended one of his hands towards Abyss Trinity's face with a cold gaze and Conception moved to his open palm.
Abyss Trinity once again froze and could not speak as Eiji stared at him with that gaze.
His body trembled and his soul screamed at him to escape...!
But how? He was unable to do so which made him keep cursing in his heart.
Shit, shit, shit! Why is my daughter's boyfriend so strong that it makes no sense!
"I forgot to introduce myself to you, father-in-law. I'm not human. I'm Eiji Seiya. In this world people sometimes call me the Demon Lord from another world."
"With my power, I can destroy anything. And with my defenses..."
"Forget the Magic King Weapon. No one can make a scratch on my body unless their attack goes beyond the sixth dimension."
"...?!"
"It's not that I'm telling others my weakness. But even if someone manages to injure me. I have constant regeneration which basically makes me immortal."
"!!!!"
Not just Abyss Trinity, this time everyone who heard what Eiji said, especially Arata was dumbfounded.
What the hell?
Not only your power, but your defense is also very cheating! It was even more cheating than Abyss Trinity's nothingness defense.
Abyss Trinity began to laugh out loud in his heart. From the beginning Eiji seemed to be able to defeat him, he somehow just played around with him which made his pride as the Magic King crumble.
Eiji didn't know Abyss Trinity had completely given up. But even if he had known, he wouldn't have stopped the ten purple magic circles that overlapped in front of the man's face.
"Ravia Gieg Gaverizd."
This was actually one of Anos' spells. He could still use it in Varvatos mode because he knew how to do it.
Right after he said that. The magic circle shot out extremely bright purple lightning and an extremely loud rumble as if to remind everyone of the apocalypse.
Of course, it wasn't just the Abyss Trinity that turned to ashes. But the entire area of the Sky Library in front of Eiji's attack was now ashes and the clouds within a radius of thousands of kilometers were darkened and shrouded in lightning as they were affected by his purple lightning.
All on the mainland who saw the sudden weather change phenomenon above the sky were completely terrified. Many of them thought the apocalypse had arrived or a certain god was angry.
"...." Lilith and the others had covered their ears since Eiji unleashed that terrifying attack.
Their bodies trembled slightly as what had just happened made them shudder because it was too powerful!
Wasn't Eiji overdoing it?
What they thought was not wrong. Eiji could actually kill the Abyss Trinity with a smaller explosion or even no explosion at all since he had a spell that could do that.
But even though he was humble according to himself. Eiji still wanted to show off a little to the women. As for Arata who now looked dazed? He didn't care at all.
"Victory is mine."
[Congratulations, Master.]
"Judecca, you've also contributed to my battle this time. You are useful."
[I'm glad to be of use to you, master.]
While Eiji and his sword, Judecca were busy celebrating their victory.
Lilith walked up to her boyfriend with the others and asked. "Um... Eiji, I'm not angry... Just curious. But didn't you say you wouldn't kill Abyss Trinity because you could defeat him without killing him and make him no longer dangerous to everyone?"
Eiji was stunned when he heard what Lilith said. He looked at the girl with a reassuring smile.
"Lilith, don't misunderstand. I can explain it."
"...." Everyone.
Are you sure you can explain it?
Although many of them didn't care whether Abyss Trinity lived and died. Still, that man was Lilith's father.
...
A few minutes later.
Lilith held the Magic King Weapon that his father, Caina, had previously used in his hand.
After hearing Eiji's explanation.
Lilith nodded and said, "I understand. Abyss Trinity's body was destroyed but his soul still exists and now he resides in this sword."
Everyone looked at Caina.
Lugh and Arata looked at the Magic King Weapon greedily.
The former was a famous treasure thief. So of course she was interested in Caina.
But the latter? He only wanted the Magic King Weapon because as a Magic King Candidate he didn't have one yet!
Still, unlike Lugh who was almost drooling. Arata tried to hold back his greedy expression because he didn't want Lilith to dislike him even more.
"Yes with this my father-in-law has been defeated even though he is still alive, he is just a weak soul who now resides in a sword. He will not harm anyone, I have even added a seal to Caina so that he cannot get out of there."
"Thank you Eiji."
Lilith didn't know what else to say other than thanks to her boyfriend. If not for Akio and the others, she would have kissed that boy.
Although she didn't like her father, Lilith felt more relieved that he wasn't dead and maybe she could try asking him things.
She was honestly curious about her mother because in the fight earlier, Eiji and her father had talked about that woman.
...
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