Gaster raised the blade.
"H-huh? What… how did you… that's… damn you!"
Flowey fired a barrage of bullets at Gaster, who easily blocked them, before falling toward Flowey and bringing down the knife.
24 damage!
Flowey squeaked in fear.
Gaster brought it down again.
31 damage!
And again.
58 damage!
And again.
80 damage!
And again.
143 damage!
Flowey's eyes were wide in shock, staring blankly forward. He flashed back to Genocide. So many genocides. The blade fell. Again, and again, and again. He fell into so many pieces, but Chara wasn't satisfied. They were never satisfied. Never. And now, in this new form, he remembered all of it. Every last death. And there were millions. Millions of them.
And now Gaster was doing the exact same thing. His screen cracked a bit, long slices appeared down the vines that grew from his body, and some of the vines were severed completely. His massive jaws tore and buckled under the force.
It hurt.
Flowey suddenly leaped backwards and fired a laser from his jaws, sending Gaster flying.
"Where did you get that, how are you so strong, why would you do that, and HOW DARE YOU!?"
Gaster smiled, healed up a bit, put his hands behind his back, and answered.
"I got it right here, I'm this strong because of all the DETERMINATION I have acquired, I did that because I knew the effect it would have on you, and I dare, because I am Gaster."
They were so afraid. They hurt so much. When Frisk broke free from the Underground, taking their friends with them, they had been happy, so happy that the monsters were free, and so happy that ASRIEL could kill a human to get their SOUL. But once ASRIEL was here, they heard Gaster's temptation and easily caved into it. They were glad to give him power, if only he could help them exist again. So they gave him their DETERMINATION, bit by bit, one piece at a time. And then, when he asked for it, they helped him directly, loaning them their knife, their power, and their will.
But now, ASRIEL was hurt, mentally and physically. They didn't want to do that. They had seen what Frisk had done, and they liked it. Everyone was happy, and that meant that they were. But when they had tried to slow down, to stop attacking, they couldn't. Gaster wouldn't let them.
And they didn't have their DETERMINATION, either. They were alone and afraid.
"Y-you! You got that DETERMINATION… you got it from a little child who died and exists here! A little child who would do anything to come back to life, and you DRAINED it from them! You don't deserve that DETERMINATION! You… you…"
"What? I'm legitimately curious."
"IT'S A BEAUTIFUL DAY OUTSIDE!"
Flowey whipped out a massive vine and launched it at Gaster, who dodged, brought down his knife, and sliced it in half.
"BIRDS ARE SINGING!"
A massive number of bombs flew at Gaster, who sliced them with his knife, setting them off but seeming almost completely unaffected by the blasts.
"FLOWERS ARE BLOOMING!"
Photoshop Flowey opened his massive maw and fired off a tremendous blast, yellow petals floating slowly down to the ground as Gaster blocked the shot with a crimson energy shield, before slashing yet again at Flowey.
257 damage!
"ON DAYS LIKE THIS…"
Flowey simply scowled viciously at Gaster. He couldn't LOAD. Gaster was too determined.
The enigmatic killer slashed downward with his knife once again.
380 damage!
"Guys like you…"
Gaster slashed again, five times for good measure.
499 damage!
700 damage!
945 damage!
1380 damage!
1502 damage!
Flowey's eyes were tearing up. His voice faltered. His screen was shattered into so many pieces. He backed off, letting his two remaining SOULS do the work for him. Massive frying pans brimming with flame flew at Gaster, smacking him around a bit, before he turned to see a loaded gun pointed at his face, which went off, sending him flying.
Gaster slashed at the gun, avoiding it's next strike by forcing it to float backwards to dodge the slash, before cutting one of the pans in two and swinging his blade sideways, sending oily flame everywhere. He grabbed the ACT button, healed, and avoided the sudden attack from both the Yellow and Green SOULS.
Flowey had only 1 HP left.
"So. Was it that easy."
"Let them go."
"Let who go?"
"LET CHARA GO!"
Flowey screamed the last sentence, tears flinging from his eyes, his voice cracking with rage, sadness, and terror.
"Ooh. Let chara go. You mean… them?"
Gaster lifted his hand, and suddenly, he was holding them. There, hanging from their collar, tears streaming down their face, was Chara. They looked up at ASRIEL, looking for help.
"You BASTARD! Let them go!"
"I'd rather not, in fact. And I don't believe you're in any position to order me around."
"What is wrong with you?! Why are you doing this?! I don't understand!"
"I am doing this because this was done to me. Everything was taken from me. My family. My friends. My research. My life. My body. My SOUL. My very existence. EVERYTHING! And it wasn't Sans that did this to me. It wasn't Alphys. It wasn't ASGORE. It wasn't any of them. It was the universe itself. A universe that had conspired to make my life a living hell! No one, no one, understands this. Everyone thinks they know pain. Everyone has lost someone. I lost EVERYTHING! I'll GIVE YOU something to cry about!"
Gaster sent a surge of electricity into Chara, who cried out in pain and fear.
"Stop that! Stop that! STOP THAT!"
Flowey screamed at Gaster, the human SOULS that powered him circling his body in agitation.
"You MONSTER! WHAT IS WRONG WITH YOU!?"
Tears ran down Flowey's face as he screeched in pain and rage, unable to even move thanks to his injuries.
Gaster kept shocking Chara, as he began to laugh.
"It's over! There is NO ONE that can stop me! No one! In just a moment, I'll have all the power I could ever DREAM of, and all the loose ends have conveniently tied themselves up! Say goodbye to your brother, Chara! You've served your purpose, and I tire of your whining."
Gaster raised his other hand and pointed it at Chara's face, preparing to blow them into pieces and make them even more dead than they were before.
"H-hey! Y-you can't do that! You can't do that!"
ASRIEL was terrified. He struggled to move.
Nothing happened.
He tried to use his powers.
Nothing happened.
He tried to load his SAVE file.
Nothing happened.
He called out for help.
But no one came.
Gaster prepared to kill Chara.
"That's enough!"
Flowey's voice cracked, as Gaster fired.
"THAT'S ENOUGH!"
Flowey's last word came out as one elongated enraged screech, the pitch and tempo of his voice wavering as he let it out with all the force and volume that his supernatural body could muster.
The SOULS hovered around him, slowly circling.
Their speed increased, more and more.
Soon, they were nothing but a colorful blur.
Green light glowed from all of them, enveloping Flowey's hulking but wounded body.
He stood, and Chara looked up, somehow still alive. Somehow, their last ounce of DETERMINATION had saved them. ASRIEL stood before them and Gaster, every last inch of his tremendous frame at it's maximum hight, all of it's health recovered.
"But I WON'T let you do that!"
Flowey wore a cocky smile, his eyes flashing with power and confidence.
Gaster gasped.
"B-but… HOW?! The SOULS would never heal you! You have all intention of destroying their entire race.
"Right now… I can feel everyone's hearts beating as one!"
So could Gaster. And he didn't like the feeling.
"And, mine included, we only have ONE goal!"
The scientist scowled in rage.
"To defeat YOU!"
Gaster balled his hands into fists.
"MONSTER! No, whatever you are! For the sake of the whole world! I, ASRIEL, will STRIKE YOU DOWN!"
A flash of light exploded in Gaster's eyes, as he felt a massive rush of power fly inwards from what seemed like the entire universe, white SOUL after white SOUL passing him by, all being absorbed into the being that stood before him.
"HOWDY! Gaster! Are you there? It's me, your worst enemy…"
Gaster cringed with a mixture of apprehension and rage.
"ASRIEL DREEMURR!"
Shit just got real, folks! Either way, it's finally happening. For the Child's Sake is almost over. If you've stayed with me for this long, congratulations, 'cause I'm not even sure how I managed to keep doing this crap. So for those of you who are getting bored, stick around, because the FINALE is coming up fast!