The void

Gaster's Pocket Dimension

     The Doctor spoke in his own language, devised to only be understandable by anomalies who can not only control the monster world, but also the human world.
     Gaster seemed to looked confident, yet impatient. The Doctor pointed down, and at once they were both dropped into a battlefield. The human knew exactly where they were. The Battle Between Humans and Monsters. But this was different, there were no humans except itself. The monsters weren't usual, too. They were amalgamates. Only amalgamates.
     All the human could hear was screaming. Screaming for miles and miles. It was ear piercing. Then the human saw its friends, they were fused as well.
     The human saw Sans and Papyrus fused together, screaming in pain. Both of their outfits seemed to be melting into each other.
     Then their was Undyne and Alphys, oh God. It was horrible. The human seemed about to puke. They were connected at the legs. There were 4 Spears through them, three in the chest and one through their vocal cords, not allowing them to scream or even speak. They couldn't walk with their legs, so they had to crawl. The worst part was that the spears would never move. They couldn't move. Their body parts wouldn't let them. Everytime they crawled, they seemed as if they wanted to shriek, they wanted to stop. But they couldn't. They weren't in control anymore.
     Asgore, Asriel and Toriel were fused together. Their mouths were all connected in a chain, and looked as if it would open to be larger than its whole face. It was in extreme pain. It could barely move, and when it did it usually fell. Any attempt to talk made the other's shrieks louder, drowning out the one's speaking.
     They all looked as if they had been here for centuries. Sitting painfully, waiting for the human. Gaster was nowhere to be seen. A minute passed, then another, then another. Half an hour had passed. The human felt an unusual pay on their back they turned around and saw W.D Gaster, but he wasn't in his usual form. He was much larger. He pointed at the human, starting what seemed like an earthquake. It sounded like a stampede of bulls.
     The human began to run, after being frozen from seeing the army of amalgamations charging at them. They had never felt such fear. Even if the human tried to stop running, they wouldn't be able to. There was no stopping. They couldn't stop. When the human eventually reached a small town, it watched as everyone was torn apart by the mutations. Screaming and crying. They cried for their mothers, for their wife or husband. But nobody came. They all died beside their screaming townspeople. The human was then frozen once again. They lost the ability to move completely except to make noise.
     Once the mutations were finished with the townspeople, they went over to the human. They began cut open the human's torso, extracting organs, it's spine, ribs and flesh. The human writhed and screamed in pain. The amalgamates didn't seem to notice or even care.
     Once the human finally died, they loaded their last save and found their way to the exit of the lab. But when they opened the door, it revealed only a void. Once the door opened, the void began to rush into the lab, consuming it all. Then Gaster appeared again in his usual form. He was chuckling.
     "That (won't/will not be) the last time you die. This (is/will be) your personal hell. You (will be/are) stuck here for eternity. I know what you will do." Gaster spoke. As he finished, the doctor stretched his arms out. They were longer than a school bus. He grabbed the human's torso and legs, and tore the human in half, only allowing the human to get out a whimper before loading their last save.
     This time, they were dropped into the final corridor. Sans stood there as well, yet turned away from the human. The human walked to Sans cautiously. Once they were about 2 meters away, Sans yelled "STOP". The human, frightened, jumped back. Sans turned around, revealing a burned face. His left eye was gone and he was crying. Half his head was black. He was quivering. "B-Back away!" He said. Unwillingly, the human reached for a knife that they didn't know they had. They stepped towards Sans. "I-I don't want to hurt you, please stay back." He said. Yet the human grew closer, with every step Sans backed even farther away until he backed into a wall. Sans put his arm up and flung the human, then summoned a Gaster Blaster to finish the job.
     "Pshhh" The Human heard as they watched as Sans died. They fell to the ground and regained control of their body. They rushed over to the pile of dust and cried for their lost friend.
     Then the human felt a stabbing Pierce through their back and out their stomach. They looked down and saw a red trident. They heard crying from the king as he took out his trident to kill the human.
     Then it stopped, and the human loaded their save. But this time, their save was different. It wasn't called "The True Laboratory" anymore. It's name had been changed. "The Void".