Just like what he promised to himself, he waited for a whole month.
In this whole month, he has been focusing all of his upgrades only in his body.
He is becoming stronger. It has become evident when he can easily carry his bed in a single hand. The obsidian door, which is supposed to be pretty hard to open without using the button besides the door to open it, can easily be opened by him by just pushing it with his sheer arm strength.
He has also become smarter. He can easily absorb new knowledge into his mind like a sponge. He can even remember things he forgot since he was a child.
It's all thanks to him upgrading his body repeatedly.
He felt like he can outrun those rats if he wants to. Though he wouldn't dare.
Anyway, he have busied himself by upgrading his body and passing the time with some activities like eating or writing something on his phone. He have been waiting for those rats to be exterminated.
Though it seems like even when a month pass, the rats are relentless. The faint sounds of his laser turrets below shooting those monsters can be heard every single night.
He can make a guess. The giant rats seems to be active at night, though they seem to be responsive whenever they sensed something. He thinks that's what it is because he have tried going out once again and installing more turrets, only to encounter some rats and kill them all while retreating.
Every single night, his sleep is being disturbed just because of the tireless monsters trying to move around the first floor. They are endless.
This has gone long enough. He can't wait for another day to hope for those rats to be vanquished.
So he decided to go down and deal with them carefully.
Even if he is scared, he got some confidence after gaining strength. He have a strong body, and he have been strengthening it for the sole purpose of dealing with those rats.
When will he use it then?
He thinks he should stop thinking that. The logical thing is to wait it out.
But enough is enough. He didn't want to wait anymore. Those giant rats must be destroyed. He is desperate like that.
So even if he thinks he is not that prepared, he made some preparations to leave his room and find the source of the rat infestation.
He won't have a peace of mind if he let them roam the first floor and let things stand. He must take care of this problem from the root!
He have asked his DF for advice, and it suggested some weapons that it thinks will help him deal with the rat infestation. He tends to believe with it, because it have already proven its blueprints capable of doing great things.
"Let's do this!"
His eyes looks straight to the door, and seems to be piercing through it. His expression determined.
~~o~~
He have outfitted himself with a jacket, long pants, and a pair of leather shoes. These have been upgraded from the amount of scraps that he have.
Going around in white T-shirt and shorts is not safe for him. He needs some added protection, even if it's just clothes.
It helps him staves off cold too, so it is nice to have.
Along with the clothes, he have prepared some weapons that will take care of those rats.
Before leaving his room, he have spent some days asking DF about the weapons. He is specifically asking for those that can easily kill rats, or a swarm of monsters.
With the thousands of options that DF proposed, he have chosen five main weapons.
One of it is a flamethrower.
They are pest, so it is obvious that they are weak to fire. He even have proof of it. It is when he used the burn rifle, those rats are easily burned to death.
Basically, those giant monsters are weak to fire. He is going to ravage them with flames.
Four of his choices are fire related, while the last one is a bioweapon. Essentially a weapon specialized on dealing with biological creatures.
As he got to the first floor, he saw a bunch of rat corpses, along with the intense stench of their corpses. While pinching his nose, he quickly converted all of these rats into DP.
After that, he moves forward with the flamethrower on the ready.
This flamethrower is not the same as what he knows. It is a futuristic flamethrower capable of shooting flammable agents that can burn for a long time. The heat of the flame easily reaches 2,000 ~ 20,000 degrees celsius.
A normal person wouldn't be able to use it due to the intense heat it can cause, but for him who have upgraded himself for the past month, he have become durable enough that he can at least withstand it.
Of course direct contact to the fire is still not something he can handle. So he have to be careful with it.
With the flamethrower on the ready, he walks slowly on the dark hallways. He is not carrying his lantern so the area is very dark.
He would have carried it, but the flamethrower is pretty big. Even if he can lift it with a single hand, he would have a hard time aiming it. So he opted to leaving it.
He can see clearly in the dark, so he thinks it is useless.
He is scared. He knows that. It is evident by how slow and measured his steps is. But he wanted to deal with those rats. Staying cooped up on his room is not preferable anymore.
Going to the other checkpoints, he converts the pile of monster corpses before passing through that area. He goes deeper into this floor until he arrives at the farthest area where he put the laser turrets.
Pass this point, there will be no more laser turrets and wall turrets. He have to install it while going forward.
He took a breathe. His heartbeat is pulsing a bit too quick, but it is still barely stable. His eyes dilated as he takes a gulp. Cold sweat is running on his cheek.
"... Okay. Here I go!"
With those words, he moves his legs. Taking the first step out of this area. His eyes scanning every corner as he slowly steps forward.
His feet felt so heavy. His body tense and rigid as he moves on the hallways. He is moving like a turtle.
Then he heard something, and quickly stops on his feet. His eyes scanning the next bend on the hallways.
He can hear it. The sound of gnashing, squeaking, and gnarled steps of those giant rodents.
He took another breathe of the stale and putrid air. His senses expanded and he felt himself going on full alert. His eyes not leaving that bend. His finger primed on the trigger, prepared to hold it and burn the assailants.
Then, he saw the silhouette. The red orbs glinted maliciously as those giant rats raises their sharp teeth. They are like a flood, moving in a swarm to get to him with their annoying squeak.
*SQUEEEEEEEEEEEEEEEEEEEE
He gritted his teeth before glaring at their way, his hand unhesitatingly pulling the trigger and holding it.
"Fuckers! Die with my fire!"
A spew of flame shoots out of the pointed muzzle. The flame flies through the distance, hitting the rats that are approaching.
They were burned. It's like nothing can stop the flames as it pierces through their body and burn them all. Their squeals of pain and madness resounded the whole corridor while he is just there, standing and not stopping with the shot.
While spewing flames, he is making a war cry. It is to take off his doubts and fear so he can move forward.
He took a step forward, and another as he holds the trigger for the flamethrower. The flames in ceaselessly spewing out flames, untiring of it's purpose.
As he got near to the burning charred corpses, he quickly opens his two systems and automated their conversion. The target will be the rat corpses.
The two systems, Over Dimensional Oven and Dimensional Firearms, can only convert non-living things. So he must kill the rats first before he can convert them into DP.
He is burning, and then converting their corpses. If it were a group of people, they would have been scared shitless!
But these are just monsters. Giant pests who only moves with their instincts.
They have a maddened state, and seem to be bloodthirsty. They wanted to get to his position and tear him to shreds.
But this corridor is the only path they can take. Behind him, there are the laser turrets on the distance. So those who are thinking of doing a pincer attack will have to pass through his array of laser turrets.
So they only burned, stupidly moving to their death.
Still, they are uncountable. If he burned one, two more will appear. Then more will come as he burned the wave to death.
Waves upon waves of swarms are rushing to his general area. They are excited to tear him to shreds. It is unknown why they are in this berserk state.
The few minutes it took to get to that bend felt like an eternity. Though after he got to it, he quickly installed laser turrets on that bed along with the wall turrets. Of course he is still burning the rats to death while doing that.
He have become used to multitasking. It might because he upgraded his brain so it is easy for him.
"Yeah! Die motherfuckers!" He yelled, shouting whatever he can think.
He have been pepping himself up, just to take off his fear. The only thing he can think of is scream his anger at them, and frustration at being stuck on this building.
This is just the start of his extermination. He will make sure that this will end today.