Zagronan finally finished the illusion world after what felt like trillions of years, but according to Rachel, it was only 10,000 years.
He discovered the root flaw in the world in the black dragon scene.
A group of explorers has invaded the Illusion world in the past; they became its core flaw.
But for Zagronan, it didn't make sense.
The Illusion world was already there when explorers invaded it, so what was its core flaw before the explorers attacked? Did the core flaw change?
According to Rachel, the core flaw cannot change.
So, how was the world there already before explorers invaded? An illusion world is founded on its core flaw, so how did explorers discover it? The core flaw cannot change, so the illusion world wasn't even there before the explorers' attack. It doesn't make sense.
And, because it doesn't make sense, it is exactly the core flaw.
Illusion worlds are dreams of the universe; like all dreams, they don't make sense.
While knowing this flaw, Zagronan realized something fundamental about illusions: they aren't supposed to make sense.
The illusion existed before it was supposed to? In fact, it's the opposite; the world is an illusion; it never existed in this reality.
There is a flaw, but there isn't really.
As Zagronan discovered the core flaw, the illusion world disappeared.
Or rather, it was never there.
The only thing that remained was Illosion's concept of Grandmaster for him.
His time spent was absolutely worth it; he managed to attain Grandmaster mastery of the concept of illusion.
Grandmaster mastery is the same as that of most immortals. Only geniuses, or in Zagronan's case, only those with resources, can accomplish such a feat.
What's more, the concept of illusion is a fringe concept very difficult to get. There are very few under rank 12 who have it.
With mastery in the concept of illusion, he already has many planes.
He used to focus on the concept of wisdom, but his mastery was not even at the master level.
He is not talented when it comes to his brain.
Now, with the Grandmaster of illusion, he can think of all kinds of spells and methods of illusion with a mere thought. He doesn't need to rack his brain; he can intuitively realize almost everything about illusions.
Moreover, he has a thought, an idea about a complete law called 'fake wisdom.'
The complete law of 'fake wisdom' can twist true wisdom into illusions. It's very complex and hard to defend against. He planned to create it as his complete law to reach rank 10.
It's just that Rachel informed him that she already knows of this complete law.
So, helplessly, he continued to research.
He thought of complete laws such as 'illusion into reality,' 'illusion numbers,' 'undetectable,' 'obvious,' etc. Rachel already knew every one of them.
He has to find a new complete law for Rachel to allow him to advance.
The only way is if he gets more specific; these general complete laws are already discovered.
So he did.
He thought of illusion numbers. He found the main formula for 'illusion-7,' 'illusion-563,' 'illusion-66631495,' and one hundred more number illusions, but all were already known by Rachel.
Even if they were not, illusion numbers were weak, so he wasn't sure he wanted them.
After a few decades of hard work, he finally found a good complete law that Rachel didn't know.
He called it the 'illusion slaughter of 7 demons.'
This complete law is good. It can significantly help in battles against demons and is useful against other species, too.
With good spells and formations, it's not much weaker than famous illusion complete laws like 'illusion strike.'
Of course, 'illusion slaughter of 7 demons' is specific, so against groups of 7 demons, it's more powerful than 'illusion strike,' but against any other thing or creature, it's weaker.
However, Zagronan was satisfied. He decided to create this complete law.
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He discovered the formula's main materials and most complimentary parts. The rest will have to be discovered while he is breaking through.
Not all are lucky to have the formula ready and someone who paved the path. He can only be prepared for everything and try to do it.
When rank 9 is trying to break through to rank 10, the universal laws of the universe help; with those helps and his Grandmaster illusion mastery, he believes he can fill any gaps on the spot.
If not, he still has Rachel to help. Rachel can create pills that help him survive even if he fails. Failure is not unexpected when trying to explore unknown paths.
With all of this done, Rachel finally allowed him to return.
...
Lana's luck was as great as ever. Demon kings still didn't dare to rebel and obediently remained. Being with her had some benefits. Rachel had already given one of her incarnations to each, so they were consuming pills and getting stronger.
Lana herself also had a Rachel.
After so many years of Zagronan's absence, she remained loyal to him and refrained from being with any other ... no, just kidding. In the first week of his absence, she had already started sleeping with other male demons.
Now, after so many years, she has many children with all kinds of males from all species and races; she even has some children from trees! She kept those 'rare' tree children and ate other 'regular' children.
Rachel's incarnation with Lana was so shocked by tree children that she informed Rachel #1 to record it in the database!
As for what happened to Zagronan? Lana didn't give a damn.
She was a true demon not capable of love. The only reason she remained with Zagronan was for benefits and nothing more.
...
Lana was in bed with the demon kings around, fanning her with luxurious fur fans. She loves being hot, so those fans are a decoration she learned from humans, a show of status.
As for whether she felt any shame with so many present while engaging with a male human in a critical affair, of course not; even many humans don't have much shame for that, let alone Lana.
Just as the human male, who was so muscular and tall that he was nearly as the giant Lana, was about to finish, the door was kicked open, and Zagronan came in.
Lana paid no heed and continued shamelessly.
Zagronan snapped his fingers. The human male melted into a red liquid.
"You did it again? I told you last time to let him finish!" She shouted angrily.
"Don't worry, I will finish it for you!" Zagronan smiled kindly.
He truly loves Lana. She is treacherous, evil, incapable of love and compassion, shameless, disloyal, etc.
She has every evil trait out there, and Zagronan loves it!
Nowadays, he gets very emotional about what Hell used to be. While solving the illusion world, he thought about Hell every day. Now, Hell is gone, but not all of it. Zagronan looked at Lana as he was busy. Indeed, she is the worst Hell can offer, the lowest and most corrupt. With her here, he won't miss Hell much.
...
Zagronan came out after an entire week.
"Well, I'm finally back!" he stretched comfortably.
"Nothing is like home!" he sat down and looked at the sky.
"Zag, it's time to start!" Rachel said.
"No, please, let me enjoy a little," he said.
Rachel reluctantly nodded. The mental condition is critical, too, so if resting a while can make his mind clear, she is willing to give it to him.
"Then, do things you enjoy, and clear your mind," she said.
"Things I enjoy? I enjoy sharpening my edge! Let's destroy a few continents!" he stood up.
"Zag, do you enjoy anything besides slaughter?" she asked.
"Like what?" he asked.
"Like fishing, as you did before!" she said.
"I used to enjoy fishing, but I can easily catch anything nowadays. With my luck, fishing is no longer fun," he said. With the luck of the main protagonist, he can fish out of a desert.
"What else? Anything you enjoy? Something peaceful, so no war or massacre counted," she said.
"Let me see, I do enjoy sex," he said.
"Something peaceful! Your sex with Lana is anything but peaceful!" she retorted.
"I don't know! I don't think I have anything I enjoy besides those! Even my meditation is out of a desire to survive, not because I enjoy it," she said.
"Have you tried reading a book?" she asked.
"Don't talk about it! As it is, I'm losing my edges; if I read books, I soon get completely blunted," Zagronan replied.
Rachel sighed and said, "Just go destroy the Red River continent."
She gave up on persuading him to engage in more peaceful activities. It's simply not in Zagronan's brain circuit.
He smiled and started flying.
...
The Red River continent was split in half by a great red river that ran horizontally from one side to the other. The continent was magnificent, with most areas being peaceful and prosperous.
...
A bird was singing in a beautiful forest. The sound of water calmed Liz's soul as she lay there and enjoyed the scene.
She was a knight attendance, working for a baron. Still, as a female knight attendance, they took it easier on her, so she had the time to rest like this.
Allowing women to become knights was a fierce debate. And among those who advocated for allowing women to be knights, the treatment was a big debate.
Some argue that women need special care because their physique is different. Others argued that treating women better and letting them have more days off would discourage nobles from accepting women knights. They would just replace women knights with men knights who don't need special treatment.
There were other debates, too, like, should the government mandate paid leave for new mothers? The argument was the same, with some saying yes and others saying it discourages employers from hiring women at all.
The fact that the country debated these issues showed how good they had it. Food and necessities are the issues in crisis-ridden countries, but in rich countries, these relatively minor problems get debated hotly.
Just as she was thinking of these, she saw the sun falling!
"Bang!"
she heard it, and then everything went black.
...
"Fireball," Zagronan cast.
It was like the sun from afar, so bright that it even outshone the actual sun.
It hit a city and destroyed everything within.
Zagronan laughed.
He felt his edges sharpening! After so many years of killing illusions, his edges were as blunt as a brick! Now, they are being polished, becoming like razors.
He continued his destruction until the whole continent, which used to be a tourist destination for wealthy mages, turned into a piece of coal!
Zagronan looked from above and sighed with relief. "I think my mind is finally at peace!" he said.
"Are you ready for advance?" Rachel asked.
"Not yet! Let's do another continent!" he said.
"Another? Sigh! This time, go to Green Circle continent," she said.
She didn't argue over a mortal continent.
She doesn't like to kill for nothing, but in her view, this is not for nothing. It is for the peace of mind of her host, Zagronan.
Zagronan's success in the complete law of illusions will help the main body! She is willing to kill the entire world if it helps the main body.
As for the innocent people, she honestly doesn't care. She can pretend to care, but really, she has no feelings toward them. It might be her system, or the main body did something, or after so many years, she got numb. The fact is she doesn't care.
She will personally avoid what she considers needless slaughter and even help if it's effortless, but otherwise, she does not give a damn about innocent deaths.