When considering the temperature of the room is cold just putting the fire extinguisher in a sealed container will do the trick and by burning it until it reaches its highest temperature that it could possibly handle the content inside will explode that resulted that ear splitting sound.

'This should be enough for the zombies to get attracted in the storage room for a very long time and by the time they return to their previous position. I already quietly crawl my way out of here, it's just a miscalculation that it could have a numbing effect when you are near it.'

While he was crawling his way to the West Wing of the school, he also tries to reduce the lingering numbing effect it dealt when the explosion happen.

The explosion attracted countless zombies that aimlessly wandering around the school as they flocked towards the storage room including the students that stayed on the rooftop that was startled by this explosion.

*Roar* *Growl*

The gloomy and silent atmosphere of the school suddenly broke while the situation is become chaotic by this one incident that just happen.

"W-What is that?"

"I-I think it's an explosion coming from the storage room."

"Isn't there a guy that hides there?"

"Yeah, but I don't see him when I looked earlier, maybe he had already escaped?"

The students that were staying at the rooftop was startled and surprised as they are leaning on the railing of the roof while pointing and discussing about the sound in the storage room of the explosion.

While they are too focused looking at the explosion that just occur, they didn't notice a few people that were sneaking towards the metal door while opening it silently.

By the time they will realizes it later, it was already too late and it will throw this group of people in chaos and disarray.

"I've never seen a ballsy as that guy was. He makes an explosion that attracts a lot of zombies towards that room." Richard praises the person who made that as he hurriedly walking down the stairs.

"Yes~! Thanks to him no resistance at all!" Matt commented while looking at the group that join them for this escape.

The group has a 8 members, including Matt, Allison, Richard, Audrey and 4 others who decided to join them.

"What happened Ms. Audrey? Why did you come with us after all you said yesterday?" Matt added while looking at Audrey that was escaping with them.

"Being rational and delusional are different things, I'm not those guys who wait there until someone saved me. I just reduce the baggage for this escape." Audrey replied at him as she keeps running down the stairs.

"Is that so. Welcome to our group." Matt stopped his probing while smiling before keep his silence.

The group stopped at one corner of the building while Richard summarize their plan of escape.

"We were going to the cafeteria for a moment to get some supplies, after that we will rest for a while before proceeding on the back door of the kitchen while sneaking in to the parking lot to check for my car that we will let us escape, any question?" Richard explained in one breath before looking at his group if there is something they didn't understand.

"No problem here."

Everyone agreed to his plan as they know that he already map out this plan in his head several times.

"Well, let's get going then." Richard stood up as he lead them towards the cafeteria.

...

After reducing the numb feeling from the explosion earlier.

Ziv has already made his way through the West Wing building as he stood up and run inside it when he notice that he was already far from the storage room.

"I better hurry before those zombies started noticing that there is nothing there."

While he was making his way towards the cafeteria, there is a few encounters with zombies along the way, but with his baseball bat and spear that he got, it's still manageable to fight them without forgetting to collect the Energy Crystal if possible.

"I'll be in the cafeteria in a few minutes. While in this area I will need to be cautious when approaching it as there is a crazy amount of people that was eating here." Ziv was slowly and cautiously making his way through there without making any loud noises.

When he was in the corner away before the cafeteria, there is a noise of battle ahead of him as he saw a group of people killing zombies in front of him.

He quickly hid in a nearby room that was empty before observing the group of people ahead.

'Hmm.. There is a total of 8 people in their group, 5 male and 3 female. They are armed with blunt weapons, but not that geared as mine while the only disadvantage if I ever fight them was their numbers. Wait!? They are also going towards the cafeteria?'

While Ziv was observing them in the distance he just realizes that they were also going towards the same destination as him.

'I'm in trouble. F*ck!'

His plan was not ruined yet, but if he joins a group in here early on and a problem arose while they were in the midst of escaping there is a high chance that he will die because of it.

'Approaching them is not the best option here. I need to be patient and let them face all the trouble ahead.'

"We need to hurry before they surround us here." a tall young man that was leading to the front charge forward while the group following behind him closely.

They have some sort of formation when they are fighting the zombies around them.

There are 2 people that leading the group in front while their back side was guarded by also 2 people for ambushes and the last 4 people was responsible for their flank that constantly helping the front and the back side from incoming attacks.

'Having a teamwork meant they are pre-planned their escape. I will get screwed if I suddenly charge there.'

'I'll just wait for 30 minutes to pass before trying to enter the cafeteria and maybe approach their group.'

At first he was hesitating on the idea of approaching these people as he didn't have any idea of who they are, but if he didn't have any other options just to interact with them, he would risk doing that just to escape out of here.

After 30 minutes have passed when the group enters the cafeteria, he prepares himself and think of the worst case scenario that can possibly happen.

While he was clearing all the zombies that blocking the door to the cafeteria, he realizes that there is enough Energy Crystal that he can use to upgrade his Energy Slots.

'That should be enough Crystal to upgrade my Energy Slots while having a few extra after using it, but I don't need to hurry using it for now instead I'll try focusing in the problem I'm currently in.'

When he opened the door, he already expects some surprise or startled gazes directed at him, but in reality what he only saw inside was corpses and few foods in the food rack without seeing any people inside.

'Where did they go? I'm pretty sure they enter here, right? I'll try looking around then.'

...

When he carefully looked around the cafeteria, he discovered a back door to the kitchen where the cook and helpers was entering and leaving here.

After figuring it out he immediately fit his bag with food while considering about his mobility as he follow the tracks they left behind that lead him to the parking lot of the school.

While he was finding them in the parking lot, he suddenly heard a car engine in the distance.

*Vroom* *Screeech*

In the distance he saw the people he comes across in the corridor while entering a black SUV that was parked in the corner of the parking lot as they started the engine before driving the car towards the exit as they ram the zombies blocking it.

'There goes my hesitation, I guess?'

Ziv sighed in pity when the car disappears in his eyes while they quickly escapes the school.

He slightly regrets his hesitation earlier, but the precaution he made is given and just risking a decision that can cost his life while there is more safe options he can choose is plainly stupid.

Instead of joining them right away and test if they would have Ill intention or not. His rational side decides that he would hide for a while and observed them in the distance while stopping the impulse of revealing himself.

'Let's forget about that complicated matter. I might as well fill my Energy Slots before continue escaping here to ensure my safety.'

He looked around the parking lot while noticing that there is only a few zombies around here while leaning in one of the car's trunk.

'I will absorb it like last time.'

There is a total of 11 Tier 0 Energy Crystal that he got from the zombies while he only needs to spend 5 of them and the rest shall be stored for the future.

After applying it in his head and limb, he suddenly felt a warm energy surging through his entire body that circulate from his head and his chest all the way down to his feet while staying in the Core near his heart before he receives a notification.

[Congratulations on fulfilling the requirements to advance on Tier 1 Energy Reactor Core.]

[Would you like to advance? Y/N]

He immediately clicks the Yes button without thinking while he suddenly felt a strong headache that let him faint from the extreme pain in his head.

*Weng* *Weng*

After he faint from extreme pain his consciousness disappears from his body while arriving in a white room that producing a blinding light and buzzing sound.

In the center of that room there is a sphere floating in mid air in the size of a ball that emitting a scorching heat that filled with energy.

The moment he open his eyes, he carefully looked around the room while not finding anything interesting, he directed his attention at the sphere in the middle of the room.

"I assume that this thing is what my status called Energy Reactor."

When he observed the sphere closely, there has a 6 holes with Energy Crystal on top of it that was ready to embed itself inside.

"So, this sphere was my Core and those little thingy is the Energy Crystal that I absorbed."

When he was staring at the sphere the Energy Crystal embeds itself on the Reactor Core before it slowly increases its speed until it resembles a mini sun.

The rotation lasted for a few minutes before it eventually slows down and stopped while it increases its size by 5 times bigger than the size of the ball.

"It was a spectacular scene." Ziv was admiring the process on how his Core evolves.

When the big sphere came to its stillness and tranquility, he returned to his actual body as he abruptly opens his eyes while receiving another notification.

[Tier 1 Energy Reactor Core Completed!]

[Beep! Computing data.. Calculating user stats.. Processing..]

[Beep! Calculation Completed]

Name: Ziv

Status: Healthy

Race: Human (Male)

Radiation Level: 13.3%

------------------------------------------------------------------

Strength: (10) 20

Stamina: (10) 20

Dexterity: (10) 20

Intelligence: (10) 20

(Ah-san: this thing () is previous stats)

Tier 1 Energy Reactor Core.

Energy Slots:

Brain (Intelligence) 0/10

Body (Energy Capacity/Stamina) 0/10

Right Arm (Strength) 0/10

Left Arm (Strength) 0/10

Right Leg (Dexterity) 0/10

Left Leg (Dexterity) 0/10

Blood Slots:

Required 15 more Tier 1 Blood Crystal to unlock Natural Ability.

Level 0 Synthesize

Level 1 ???

Level 2 ???

Level 3 ???

...

Level 9 ???

------------------------------------------------------------------

"So there is not much changes in my stats except for the requirement on Energy Slots and Blood Slots, but with this strength that surging through my body it will help me efficiently escape here."

When Ziv stood up on his seat while trying to look around his surroundings if something happens, he saw countless zombies that were walking towards his direction.

*Roar* *Growl* *Roar*

After that his face paled as he checked his watch to see how many minutes has passed since he fainted.

'It's only 10 minutes! Why are they coming here?' Ziv was panicking inside while nervously thinking of the possible reason for this.

He abandons his thought of process while runs back towards the cafeteria and went inside to loop around the horde of zombie and escape their encirclement.

While he came across a few people that has an anxious expression on their face as they are running around shouting or mumbling in the corridor.

"Ms. Audrey where are you?"

"W-we need to find them, I can't b-be here anymore."

"Why is this happening.. why is this.."

When Ziv looked at these people with face of despair. He immediately gives up on informing or bother on saving them.

'They are done if they kept continue doing this.'

With his twice the speed of a normal human, he immediately leaves and run off from that place because of the noise that it may attract to zombies.

"Damn! Those zombies probably attracted to my Energy Core for sure when I upgraded it."

As he thinks about the reason of the phenomenon that happen earlier, he becomes nervous as he quickly runs towards his classroom on the second floor of the Performing Arts Building.

He pulls out his rope inside his bag while tightly attaching one end around his waist and the other one is tied to something that can hold him as he rappel down the second floor.

While putting some excess rope around his body as an assurance to avoid any accident that may happen.

"Huu.. nice and easy.. nice and easy Ziv don't panic or you're dead."

His first time descending on the second with a rope is a new experience that he didn't do before as he tried to calm down in this situation.

After almost reaching the ground, he immediately cut the rope with his knife before removing the rope around him.

"That's stressful, it's my first time. Sh*t!" Ziv cursed while he quickly runs on the Main Lobby of the school.

He didn't encounter a lot of zombies around the Main Lobby neither the gate of the school, but when he looked at the parking lot there is a lot of zombies there that's slowly making their way through the spot he upgrade his Reactor Core.

He kept this in mind before he focus again on escaping out of the school.

When the entrance of the school is near his eyes he became exhilarated while he killed the zombies that occasional pounce their body.

As he gets out of the school premises the excitement that he felt made him continues running until he was exhausted and out of breath.

"I'm free!"

"Haa.. Huu.."

While he was gasping for some air, he notices that he couldn't hear any noises around him except his shout earlier, so he tried observing his surroundings.

On the road the atmosphere was dark and gloomy while the city is filled with silence as the rats was constantly squeaking everywhere and the human activity was slowly disappearing.

What is left behind in the road is a pure of chaos and madness while of the buildings of the city were set on fire, cars that crash on each other that lead to the blockade of the road and corpses of humans and zombies.

"What is this madness.." Ziv involuntarily said before he heard a noise behind him.

"Hey!"

When he looked towards the sound that he heard a shadow of gunstock just smashed his head that made him dizzy before he become unconscious.

"Welcome to the Apocalypse! B*tch!"