Chapter Text
20 years ago..
A monster stood between Belos and a completed portal door, hands reached out to either side. What was notable was that his skin was pure white and his hands had giant gaping holes in them. He had white eyes and his sclera was black, two lines going up and down from either of his eyes. Belos looked down at him in disappointment, yet the monster refused to back down. Documents written by said monster was on a table to his right, albeit far away and containing information about the portal and something called a "Core."
Belos:"You have been by my side since I have became emperor, Dr. Gaster. I am truly curious on what changed your demeanor."
Gaster:"All it took was a little research. I figured out your own plan, you megalomaniac! This portal is to bring in your witch hunter friends so you can kill us all, isnt it!? You told me this would be a way for us to unite humans and witches!"
Belos:"And it is, old friend. Why dont you trust me?"
Gaster:"BULLSHIT!! I saw you, Belos! I saw you sapping away at a poor palisman's life, I saw you do it!"
Belos's eyes widened underneath the mask, not visible to the scientist. He lifted his hand, making Gaster levitate into the air and keep him still, having a red hue around the scientist.
Belos:"Truly a shame...you have been an excellent coven head. Oh well, guess your documents will prove useful instead."
He kept his handa raised and walked towards the documents, making Gaster swirm. Belos took a few steps before slightly turning towards him and giving a sinister chuckle.
Belos:"Your magic...your 'polychromatism,' it is so very unique. Such a shame it is useless in this very moment."
Belos turned back towards the documents, making Gaster more and more agitated with every step. He was about to grab them before they gained a cyan hue, floating towards Gaster whose right hand's hole filled with a cyan energy, the doctor's eyes glowing bright purple.
Gaster:"You will never have your way...not when I am alive!!"
The hole on his left hand filled with red energy, glowing. He pointed it at Belos, albeit barely due to the telekinesis he was under the effect of, and blasted Belos into the wall. The telekinesis wore off as he fell down along with the papers, summoning a hand to carry them.
Belos attempted to shoot him with multiple blasts but he summoned a transparent green wall with his left hand, slowly walking up the stairs while blocking each and every blast. He then reached the open portal and had the hand go inside along with the documents it held.
Belos:"You cannot do this...!"
Gaster raised his right fist with the hole visible, having it be filled orange this time as multiple white dots appeared around the portal.
Gaster:"Go to hell, you megalomaniac."
The orange hole sparked, making the dots turn orange with it. Belos ran towards the portal but it was too late as Gaster walked in the door, the dots exploding and destroying the portal door behind him.
Belos:"...Gooood DAAAAMN IIIIITTTT!!"
On the other side of the portal, Gaster walked out from what seemed like the door of a rundown shack, the hand from earlier still holding the documents as his eyes went back to a white color. He grabbed the documents and slowly went through them, sighing from relief after noticing that he left nothing behind.
Gaster:"Good, he cant get his hands on my tech."
He slowly looked around and noticed that something was off. Green grass and trees, blue sky...something was wrong. He crouched down to examine the grass, but got startled by a woman's voice.
???:"Who goes there!?"
He knew this was it as he closed his eyes, expecting to be attacked by whoever this was. After a few seconds of not dying, he opened his eyes and saw another pair of beautiful ones in front of him. She looked at the woman's face more and realized she was in her 20s along with having a doctor's coat.
???:"You look...interesting."
Gaster:"Excuse me miss, where am I exactly?"
???:"Uhm...Gravesfield, Connecticut?"
Gaster:"...Could you be more specific?"
???:"Uhhhhhh, planet earth I guess?"
Gaster:'Am I in the human realm!?'
Gaster:"Okay...this may seem crazy, but I am from another realm. I built a portal for our emperor but he turned out to be evil, so I destroyed said portal and escaped here."
???:"...Did you hit your head?"
Gaster sighed and snapped his fingers, having his eyes turn purple again along with something appearing next to him. It seemed like a giant snake's skull, the jaws disconnected from the head and floating below it along with red glowing eyes. ??? fell on her ass in fear before Gaster snapped his fingers again, the skull dissolving into dust.
???:"Y-y-you werent kidding..."
Gaster:"My name is W. D. Gaster, former scientist for the emperor of the Boiling Isles."
Camila:"C-camila.."
Gaster:"I mean you no harm, miss. May I ask for your assistance? I kind of ran from my own home and betrayed our leader."
Camila was hesitant. She believed that anyone can be helped, but that man just did witchcraft in front of her eyes. All she could mutter were "um" and "uhs" before Gaster reached his hand out with a gentle smile. Camila blushed before taking it, getting hoisted back up.
Camila:"Fine...I am renting a house near here. But you gotta help with housework!"
Gaster:"Hehe, lead the way."
10 years later...
Gaster stood in the very front of a whole congress room, filled with people of all ethnicities and all of them wearing suits, the scientist himself wearing a lab coat. He had multiple hands summoned and holding boards, showing his presentation that presented what seemed like a giant machine surrounded by a lava moat.
Gaster:"...In short, the CORE will take the heat energy from around it and transfer it to energy for the entire city. A virtually infinite, clean, self-sustaining power source!"
The suits looked at each other and began to whisper before they all slowly but surely gave him a thumbs up, approving of the project. Gaster had a giant smile on his face as he went for a bow before his phone rang in his back pocket. He excused himself and went backstage, reaching for his phone. He saw that the contact was named "Camila" with two hearts next to her name. He opened the call and decided to gave her the news.
Gaster:"Hey, honey! Good news, the patrons all loved the idea. Told you it wasnt-"
Camila:"Come to Luz's kindergarten right now! She got into an accident!"
Gaster's heart dropped as he changed from his lab coat to black trenchcoat, snapping his fingers and instantly teleported to the kindergarten with no care for the congress.
He bursted through the doors, asking for his daughter only to be met with the sight of every student and teacher hiding in fear.
Gaster:"What happened here!? Where is Luz!?"
Teacher:"O-outside...please, stop her."
Gaster's confusion skyrocketed as he ran outside. He kicked the doors open and saw that his worst fears had come true. He saw a teacher hiding the kids behind her while Camila was in front of them, facing a very distressed Luz.
Camila:"Luz, carino...I need you to calm down...and make that thing disappear, okay?"
Luz was holding her arm while tears were falling from her eyes. She looked just like her father with the eyes and hand holes yet having the face of her mother. Her pupils were glowing purple as something was floating above her, the same thing Gaster showed Camila all those years ago.
Luz:"I...I dont know how..."