Liera titled her head. Yu IlHan momentarily couldnt breathe after looking at her beautiful face, but as always, he hypnotized himself to think that Liera is a sister-like being and continued speaking.

Backdoors refer to program codes that the developer put in in order to access an operating system or an application more easily. Lets say that theres a backdoor on my computer. Although I would usually have to input a password in order to access my account, the developer can access my account without any identification, and even remotely too. It literally is a back door.

[Thats a thing bad guys use!]

Youre right. Although its not really made for evil purposes, the concept is like that.

[But why does that word come up here?]

Well, then. Think about why I would have mentioned such a word at this time.

Liera colored in doubt. Yu IlHan gave her a little time for her to realize it herself, and his expectations were not betrayed as her face colored in shock.

[You, dont tell me!]

Its exactly that.

[You scammer!]

Its quite satisfying to hear that from the original scammer.

What was there to hide? Yes. During the 2nd Great Cataclysm, Yu IlHan had tinkered with all the Traps of Destructions that were to be scattered on Earth!

However, what was more amazing was not that he tinkered with them, but the fact that none of the higher existences realized that.

Liera only found it absurd that she and the other angels were completely fooled by him, but Yu IlHan only proudly explained, without knowing what she felt.

I put a little more effort since I dont know when and where something weird would happen. You guys didnt know when I mixed dragon tongue and ancient elven language.

[Thats no different from the methods that the fallen angels used!]

But heres a situation where Id need it, no?

[Eeeek.]

Liera had a lot to say, but she couldnt say anything.

He was right. Earth, in the end, had fallen into a situation the Heavens Army could not predict, and if Yu IlHan had installed backdoors or whatever on the Traps of Destructions and if it helped out in this situation, then she could only accept it.

I need to dig my own hole in order to survive.

[Ugh, why is the Heavens Army so useless! However, if they were capable, then IlHan would have a hard time since he wouldnt be able to make backdoors, but wait, if we were capable, then there doesnt need to be such situations in the first place..]

Yu IlHan left Liera to her endless cycle of bad thoughts, and lowered the altitude of the flying fortress. To use the backdoor, there was a need for him to get closer to the ground.

[Krrk?]

[Kuhooh!]

When the flying fortress showed itself below the cloud level, the monsters that noticed the gigantic shadow all looked up at the fortress.

However, Yu IlHan didnt even care about the wingless monsters. If there was a lot of them, then he would have gone to battle after landing the fortress, but there was too little of them right now! What he was looking for was dungeons that could solve the insufficient monsters problem on Earth right now.

Oh, theres one there.

Yu IlHans eyes glistened. Not far from the flying fortress, a vortex specific to dungeons could be seen. Moreover, a minute aura felt from the core regions of the dungeon was proving that that was Yu IlHans own doing.

[Huh? But IlHan.]

Liera, who escaped the endless cycle, raised her head. She realized that she forgot about the most important thing.

[And so? What is the utility of this backdoor?]

I couldnt add that many. Well, I can see what kind of monsters are inside in what numbers.

[Thats good! Even I dont know the contents of the dungeons on Earth. Thats just like navigation! So its not that much different from what we informed you until now.]

Lieras expression brightened. It looked like she could accept that much. Yu IlHan giggled, thinking about how she was so honest and almost unable to lie.

But what could he do? That was just the foundations required to implement the most important utility of the backdoor.

Yu IlHan added while giggling.

And a function to make dungeons explode.

[.Huh?]

I said there is a function to make dungeons explode.

Yu IlHan knew what Liera was feeling like, so he explained in kind. She, stared at him in a daze after hearing that, before shouting with glaring eyes.

[Why did you put such a function in it!]

Although theres a lot. I could use it as a threat when the people of other countries are trying to threaten the ones close to me.

[Thats just terrorism!]

Liera was angry at the fact that Yu IlHan had made a function that could potentially harm civilians. However, he only shrugged his shoulders.

Even I dont want to harm civilians. Its just a backup method. Carrying it out is a big problem. But you know it as well, dont you? Think about the position that Vanguard holds. If I dont have such a card in my hands, it would have been worrying.

[Thats true.]

Even before the 2nd Great Cataclysm, the value of Vanguard was incomparable to all others. If the ones with authority and power had malicious intents, then they could have extended their hands to his friends and family, even if they couldnt do that to himself.

And in truth, no big problems occurred thanks to the cooperation with Kang MiRae going smoothly, but Yu IlHan couldnt be criticized for making backdoors just in case. Liera knew that, so she could only sigh.

And also.

Just as when Liera accepted the situation a little, Yu IlHan added.

If I use this, I can fight against a large amount of monsters at once. Its also advantageous for me to bring them out here instead of me going in.

[Sheesh, your scale is too big to be measured using a scale at all.]

Of course, Yu IlHan wasnt going to mention anything about the backdoor at all if he didnt need to. If it came to the worst, he was going to take the role to clean all the dungeons while going around the world.

However, the people of Earth endured the 2nd Great Cataclysm even without him interfering. No, with the gates to other worlds opening, all of the situation developed at a speed beyond his imaginations, and stabilized as well.

Even he himself, who had prepared everything in advance, was busily working in another place, so there was no need to use such a thing. However, just as everything seemed to reach the end, the 3rd Great Cataclysm occurred and flipped everything over. Although, just speaking of the result, it was a good outcome for him.

[And so? What are you going to do now?]

Make dungeons explode, of course.

[So you mean to say, since there are too few monsters on the land, you want to supplement them using the monsters inside the dungeon?]

Exactly.

Yu IlHans willpower was like steel. He was no newborn baby and knew of the dangers of making dungeons explode. Liera gave up trying to persuade him.

[Gosh, I dont care anymore. Do whatever you want.]

In fact, you dont have to tell me, I was already going to do it!

The moment the flying fortress skipped past above a dungeon gate, Yu IlHan called out a small artifact he made using a 2nd class magic stone, and dropped it on top of the gate.

The magic stone dropped rapidly and landed on the gate, and without exaggeration, the gate exploded with a boom in the very next moment!

[Kihaaaaa!]

[Freedom! Im free!]

[Kill humans! Lets earn records!]

[Kill, kill!]

In an instant, a monster army numbering a hundred thousand rushed out into the region. As this was a dungeon that was maintained from the 2nd Great Cataclysm, over 70% of them were merely 3nd class, but Yu IlHan did not care. They would grow into 4rd classes soon. The current Earth was just that insane.

Yu IlHan realized something and stopped thinking about the insane growth of the monsters.

Perhaps the people of Earth may not be able to survive even they came back.

[Thats a coincidence. I was also thinking that. But right now, I dont think you are in a position to care about other people.]

Thats true. Lets move a little quicker!

[Thats not what I meant, idiooooot!]

Yu IlHan, who made a dungeon explode quickly drove the flying fortress to make other dungeons explode as well. What was even more of a headache was that the monsters from the dungeons that Yu IlHan had freed also had the power to make other dungeons explode!

[Hey, this is completely a dungeon wave! To think youd cause an artificial dungeon wave This is usually a disaster thats at the top of the food chain in terms of disasters for a world!]

Good, fill the Earth with monsters!

[You are scary when you act like a villain like that so stop it!]

Liera didnt lack this, but Erta was better at retorts. Yu IlHan thought about that and licked his lips. He didnt want to show that he missed Erta so he wordlessly sped up the flying fortress.

The world was wide, and there are plenty of dungeons. Yu IlHans Traps of Destructions had the function to propagate the backdoors to other Traps of Destructions as well, so right now, the only dungeon Yu IlHan couldnt make explode was the hellish dungeon that he had escaped before.

[What about the aerial dungeons or the oceanic dungeons?]

I need to open all of them too. The fortress is prepared for battle whenever and wherever the battle may be.

[Uaaaah, its not like the Traps of Destructions are completely destroyed just because a dungeon was opened, but if that happens, an Overflow will happen.!]

Thats exactly what I want!

The flying fortress was not as fast as Yu IlHan with his Ruin Calling, but the maintainability and the stability of the flight was incredibly high when considering fortress of its magnitude.

On top of it, Yu IlHan was throwing artifacts like he was tossing toys, and whenever the the fortress passed by a dungeon, they were hit by these artifacts and freed tons of monsters as if a chick was being born from an egg.

[Its an Overflow, an Overflow!]

Oh, theres a dungeon in that airspace there too.

Once he had planned the collapse of the dungeons, Yu IlHan didnt know when to stop. Since many monsters were popping out at once, the monsters that didnt usually fight each other had tense atmospheres, and when the mana current was twisted, the record of monsters were fused with each other to give birth to a freakish new monster. This was none other than the signs of an Overflow.

Wow, 4th class monsters are being made real-time

[Even if you say it like chicks are being born from eggs, its a horrible sight!]

Yu IlHan smiled in satisfaction, seeing the Earth coloring in chaos like the initial stages of the 3rd Great Cataclysm, before asking Liera who looked like she had given up on everything again.

How is it, Earths growth will be accelerated, right?

[If, and only if, the enormous amount of mana possessed by the monsters return to Earth and form a cycle.]

Aha, thats my field of specialty right there.

He replied confidently and extended his hand to grab the Eight-tailed dragon spear. When Yu IlHan swung it like a conductor would in an orchestra, Hundred Eyes, which had been on standby mode all started activating.

A hundred destruction mirrors that rose up into the air one after the other. And a frightening amount of mana gathered around them The weapon that would call an equal fear and despair to all, aimed at the ground.

[Kiiiii?]

[Its still bright, but I see the moon.]

[There are a lot of moons. Theyre shining brightly.]

[Theres a human up there. We need to kill!]

Yu IlHan had destroyed so many dungeons in that short time, that the number of monsters bearing drawn to the flying fortress and gathering in the area easily numbered over a million! There were quite a few 4th class beings that were just born as well, which made Yu IlHan smile.

Well, then.

He raised the Eight-tailed dragon spear on his hand and swung it while shouting.

Fire!

Rays of light numbering one hundred connected the sky and the ground in straight lines. The unlucky monsters in their paths were all burnt to black ash.

The monsters roared at the unpredicted and sudden disaster, but the retribution of light continued until all the monsters in the region died, and until all the monsters beyond the region died.

It took a mere 3 months from the time all the dungeons on Earth were freed, to the time they were all decimated by Yu IlHan.

Authors notes

With this, the timeline is equal. Of course, the chapter will still go on.