With his wings, Yu IlHan returned to the mansion in exactly 1 minute 30 seconds. Although he had predicted this, no matter how many mountains sank and lakes dried up, Bittersweet Persona and the mansion grounds were holding out well. It could only be considered a chaos-ranked artifact if it accomplished that.
The problem was the monsters surrounding the region.
[Wow, that's insane. Earth is completely insane!]
"I agree with you."
During the 2nd Great Cataclysm, no 4th-class monsters were born directly on Earth. All 4th-class monsters were either those that evolved from 3rd-class to 4th-class, those that passed through the gate to Earth, or those born of Overflow's effects. However, none were innately born as 4th-class.
Yu IlHan thought that the 4th-class monsters that should have been born were all taken to the hell dungeon and turned into demons, but seeing hundreds of 4th-class monsters on his mansion grounds, it didn't seem quite that way.
[We need to destroy this.]
[The only remaining man-made structure. We need to destroy it.]
[Make it so that he can't step on this land again.]
[Regain peace to this land.]
However, from their words, it seemed they came here not because of the attraction of the mana from Bittersweet Persona, but because they knew this was Yu IlHan's house. Yu IlHan only laughed after hearing that.
"I'm thankful if all of you come."
Yu IlHan gripped his Eight-tailed dragon spear and poised himself. He extended Ruin Calling as far as possible, and suddenly accelerated with a super-sized shockwave!
[Critical Hit!]
[You have earned 610,395,305 experience.]
[Attack power increases by 0.85% for the next 5 minutes due to the skill, Deathgod. Duration and percentage increase if you kill more monsters within 5 minutes without concealment wearing off.]
He instantly halved a 4th-class monster that was just about to intrude, dropping from the sky at lightning speed. The clean hit killed the monster without any hint of resistance, and naturally, his concealment did not wear off.
"That was easy."
[So now you can easily insta-kill 4th-class monsters....] Even without the pile bunker or the Spear of Untraceable Trajectory! Even though you're 3rd class!]
"Don't get angry."
[I'm not! I'm just slightly frustrated and annoyed!]
Now, Yu IlHan was right before his 4th class. Although he hadn't acquired it yet, with his OP skills and titles, it became natural for him to insta-kill lower-level 4th-class monsters.
If the current Yu IlHan had fallen in the past Dareu, the dragons would have been annihilated without even using a single dragon breath landing on him.
[Hurk, he is here!]
[But we cannot see him. We cannot feel him.]
[Eeeeek... Let's destroy this mansion! We cannot find him, but we can see this mansion!]
The monsters seemed surprised by Yu IlHan's appearance and soon took extreme measures. Of course, 'extreme actions' were no different from what they usually did, and Yu IlHan only laughed at them and commenced his hunt for monsters.
[Kuaaaaaak!]
[Kihaaaaaaak!]
If the Bittersweet Persona played music with the various traps and artifacts, Yu IlHan danced at the top with his spear, sometimes with his hammer, axe, greatsword, or whip. Blood scattered in all directions as the necks and hearts of monsters were perforated one by one.
Now that he was training in the Great cosmos-severing spear, he did not need to differentiate between weapons. He had the confidence to insta-kill monsters with any weapon. And in actuality, Yu IlHan's concealment did not wear off even once during this time.
[You have earned 543,285,486 experience.]
[You have earned 491,009,315 experience.]
[You have earned 635,581,102 experience.]
[You have....]
"But these guys. They don't give much experience because they're only bigger stage 4th class."
To him, 500 to 600 million was nothing at all. However, since there were so many of them, he felt he could gain about 100 billion in experience by killing them all here.
[Ugh, uh…..!]
Liera had to try her best not to get angry. Well, Yu IlHan did level up rapidly while killing those demons in hell, so it was natural that the amount of experience he gained here seemed insignificant to him. Yes, she had to accept it like that.
[Kuaaaaak!]
[Destroy. We need to erase the traces of this damned human…..!]
No matter how fast they moved, Bittersweet Persona did not miss them. And once the monsters were restrained, Yu IlHan would fly over and kill them instantly. Many 4th-class monsters died with every passing minute.
However, that was only doable when he could see the end, but no matter how many monsters he killed with the help of Bittersweet Persona, he still felt tired after glancing at the seemingly endless waves of monsters.
Of course, he had the confidence to keep killing monsters for hours, but he couldn't keep hunting like this forever!
"This is no good."
Yu IlHan took back his spear and struck the ground. At that moment, hundreds of spears made of dragon bones embedded themselves in various parts of the garden. Yu IlHan then picked up the Thunderhammer and activated the lightning storm option on the Dragonic bracelet on his hand.
The power contained within the bracelet, which could store up to 3 times the energy of these lightning storms and release it all at once, was let loose upon a tiny point at the end of the hammer, causing a resonance among all the dragon bones.
At that moment, the hundreds of dragon bones in the garden all resonated with the hammer, spewing frightening amounts of lightning to attack the nearby monsters!
[Critical Hit!]
[Critical Hit!]
[Critical Hit!]
[Critical ...]
As the monsters he had faced so far were too strong, he had never had the opportunity to use this, but it was the strongest wide-area combo Yu IlHan had prepared to fight a large number of 4th-class monsters!
At this moment, the mansion grounds were akin to a sea of lightning. An absurd level of lightning was born from the resonance between the bone spears and the thunderhammer, and that lightning would transfer to other bone spears, enhancing their powers while frying every monster in its path.
[Kergh!]
[Khaaagh!]
Although Yu IlHan's location was revealed as he couldn't kill all the monsters at once, the monsters couldn't even attack him. The lightning storm at the tip of the Thunderhammer was the result of a large amount of mana compressed into a single point, capable of causing typhoons. So it wouldn't end anytime soon.
[Some might think you're a mage.]
"Good, I used it. I finally used it!"
Yu IlHan joyfully moved his body. Now it was time for him to finish them off with the Thunderhammer that had started the typhoon.
Not even 10 minutes later, Yu IlHan cleared all the monsters in the dungeon. However, the insanely increasing number of monsters from the 3rd Great Cataclysm was rushing over in real time, as if they were all aiming for him, so at this rate, it would only be a repeat of what happened just now.
[IlHan, now!]
"Got it!"
Yu IlHan rushed into the mansion and activated the Hourglass of Eternity. At that moment, the intruding monsters were all ejected, and the mansion and its grounds were enveloped inside the barrier of the Hourglass.
"Fuu."
Yu IlHan checked his own state in this stopped world before sighing. Meanwhile, Liera checked on the outside world and muttered with a laugh.
[This reminds me of the time you were first left alone on Earth.]
"My miserable state is still the same as ever."
[No, whether it's then or now, IlHan, you're cool.]
Liera sounded like an older sister to her much older brother, praising him. However, it didn't feel so bad, so Yu IlHan disarmed himself with a smile.
[Are you going to start right away?]
"Yeah. If possible, it would be good if I had a 5th class magic stone, but now I have the magic engineering knowledge, so I think I can complete it with 4th class magic stones."
[The mansion? Then what else is there?]
"Armour and weapons. I definitely need 5th class magic stones for those. Moreover, I need to improve my language skills to reach 4th class. Really, I would have no other wishes if I could kill 100 5th classes consecutively.
[To think my IlHan would grow so fast to say such a frightening wish right now…..]
Heading to the workshop, he immediately moved the Eternal Flame into the furnace.
He threw a single 4th-class magic stone that burned brightly, as if it had finally returned to its home, and it was gladly received, and soon a fire that could melt even dragon bones roared up. Yu IlHan nodded in satisfaction.
"Then should I start?"
[You said a flying fortress, but what are you going to do?]
"10 enormous parts to levitate the mansion and the grounds, 100 slightly smaller parts to control directions. Lines to connect them all, as well as an operations room to control it all. I also need to make around a thousand weapons that can attack both underwater, on the ground, and in the air from anywhere."
The lineup made people wonder if that was something humans could accomplish, even if they spent an entire lifetime, but Yu IlHan moved as if the blueprints were already in his head.
His brain contained the blessing of the god of smithing, as well as all the knowledge of magic engineering that the magic engineers had acquired over their lives in Lanpas. And with the materials with infinite potential he had gained in the hellish dungeon, nothing was impossible for him!
"Good, then let's start with this."
Yu IlHan immediately switched into work mode and started hammering away at metal and monster bones, but Liera, who was watching, didn't know exactly what was happening. She only felt that IlHan looked cool while he was smithing.
[So in the end, Nothing changed whether it was hundreds of years ago or now. IlHan takes action, and I watch...] Liera muttered, and she seemed to laugh before she slapped her own cheeks. Thankfully, Yu IlHan couldn't hear her as he was absorbed in work.
[Fuu, good. Now I'm energetic]
Although their positions were similar to before, there was one fact that she must not forget. It was that the Earth was very different now than it was a thousand years ago.
At that time, nothing could harm Yu IlHan. At most, it was the sperm whale he hunted.
However, things were different now. As if to prove that it was different from other worlds, hundreds of 4th-class monsters appeared, and in the future, even worse things would happen.
'A naturally occurring 5th class too... perhaps it's possible. No, it will probably come out.'
She wanted to believe that Yu IlHan could take care of all of them, but the reason he won against the fallen angel was only that he had calculated precisely and strengthened himself accordingly. He couldn't be in that condition every time he faced a 5th-class being.
And so, if, IF, Yu IlHan was put in danger against a 5th-class being…
What would Liera do then?
There was nothing much to ask. The moment she received the blessing of the goddess of love, or perhaps even before that.
'That will be the time... I'll use the powers given to me by the goddess of love.'
Liera made a not-so-light resolve while looking at Yu IlHan's figure. She would make him live through the encounter, whatever she had to do. Even if she had to pay great compensation.
On the Earth where even the 3rd Great Cataclysm had temporarily stopped, only the repetitive hammering sounds resounded clearly and loudly.