The man with silver hair stood alone in a winter forest of white snow and black trees. The heavy stone doors swung shut behind him. The goat lady's directions were simple: keep walking toward the centre of the city and he'd find the Barrier... and this 'Asgore' character. One of hundreds or even thousands of monsters he'd promised to let live.
"And here we go," the man said to himself, walking down the snowy path between the trees. To his left, his sensors detected a spy camera hidden in the bushes. He resisted the urge to shoot it. First impressions, remember? Instead, he stopped for a moment to look directly at the lens and wave. On the other side, a startled short fat lizard wearing a lab coat fell off her chair, sending a ramen bowl flying. Of course, the man did not know this had happened (his sensors weren't THAT good), so he continued walking.
The man heard a tree branch snap behind him but didn't react, just kept going. He arrived at a bridge that was blocked by the most useless fence he'd ever seen. Its wooden posts were so wide apart that they could not keep a charging bull from passing through. He was about to cross the bridge when his visual sensors lit up like Christmas at the bright light gathering into a single point behind his back. The man performed a back-flip as a white energy beam of utter doom blasted both the bridge and its useless fence to smithereens. While floating upside-down in midair, the man noticed a... short fat grinning skeleton wearing a blue hoodie and bedroom slippers.
What the hell was going on?
His visual sensors detected bright light again, so he twisted in midair as another death ray lanced past, vaporising a few trees. Then he dodged a third, and a fourth doom beam before he even landed. By that time the bridge, fence and forest on both sides of the path were on fire and in pieces.
The man did not power up his own weapons. Nope. He just shouted, "Stop that! Who are you?"
The short fat skeleton had a single glowing blue left eye. Now, the man had seen some scary things in his lifetime. He'd seen the faces melting off reploids and humans alike, but this was on a whole other level. That damn grin and that damned eye was his new creepiest memory.
"i'm sans. sans the skeleton," he (it?) said in a deep, drawling tone.
"I'm Dynamo. Dynamo the treasure hunter."
"sorry, buddy, but i never promised the old lady to spare robots."
The skeleton flung out one bony hand and the man found himself floating in midair against his will, surrounded by blue light.
"Monsters discovered antigravity?"
"call it what you like, buddy."
A row of long bones burst out of the snow beneath the man, who was then flung with extreme force down onto the bones. A huge plume of snow shot up with a CRACK and CRUNCH! The skeleton tilted his head, watching the snowflakes settle.
"still tickin', huh?"
The man stood up, smacking bone dust, snow and dirt off his armour. He was annoyed but undamaged. Metal beats bone.
"welp, say hello to my little friends."
Beside the short fat skeleton, a giant white goat skull materialised out of thin air. Its jawbone spread open, gathering energy just like a buster cannon! So that was the skeleton's weapon! How did it work? The man still didn't believe in magic. There was a logical scientific explanation for everything in the universe. Even so, his sensor array drew a blank. Only his visual sensors could detect it, and they simply reported that the energy was bright white.
The man with silver hair turned tail and ran away, somersaulting over the ruined bridge. The short fat skeleton did a double-take, his eye-sockets somehow growing wider.
"hey, you can't run from this battle!"
That blue light gripped the man again, holding him rigid. The man let out a yell and flexed his arms outward. "Antigravity factor FIVE!"
The man's power core began to shine out from the red gem on his chest. The skeleton faltered, digging his bedroom slippers into the snow, his bony hand shaking. His said in a strained voice, "hey bud, that's not fair."
"Antigravity factor TEN!" The man's power core beamed brilliant ruby light from his chest. "Let... me... GO!"
The skeleton relented with a pained grunt, closing his glowing left eye, dropping his bony hand. The man shot upward at high speed, well over the highest treetops. He then fell slowly back into the snow with the agile grace of a falcon. By that time the skeleton had caught his breath, reopening his glowing blue arcane eye of doom.
"welp, guess you have to meet the whole family."
"I am the best in the world at running away!" the man yelled over his shoulder, dashing, skidding, leaping and rolling as more of those goat skulls appeared in front, above and behind him, spitting intense white fiery death but never finding their mark. The snow on the ground began to melt from the heat, and more trees burst into flames. A well-constructed sentry station exploded nearby. The man kept on sprinting like a champ, putting his leg boosters into overdrive to avoid disintegration.
He arrived at a fork in the path but just barrelled onward as more of the forest went up in flames around and behind him.
"Stop shooting!" the man yelled as a tree fell into his path. He vaulted over it, dazzling white destruction raining from the skull-covered sky. A second, poorly-constructed sentry station exploded nearby.
He could hear the short fat skeleton breathing heavily somewhere behind, though he could not hear any footsteps following. Wait, why did it need to breathe? "stop dodging, then i won't have to shoot anymore!"
They came upon a third sentry station adorned with a cute wooden carving of a dog face. The white beams of doom spared this rundown shack, for some reason. The man heard a dog barking, but didn't stop. Two short swords imbued with blue light whizzed into his head, bouncing off his helmet with a clink and a ping!
The barks turned into an excited voice. "I SAW SOMETHING MOVE!"
"you sure did doggo, now sic 'em!"
"IT IS AN INTRUDER!" the dog barked with infinite joy.
"Leave me alone!" the man shouted back. Now there was an anthropomorphic dog wearing a pink muscle shirt and leopard-print stretch pants chasing him, too! With swords! Who let the dog have swords? It isn't safe!
The next area was covered in shiny blue ice, and the man had too much forward momentum, so he slipped and fell. So did the dog, who yelped and barked as he tumbled ears over tail across the ice. The death rays had stopped firing. On the other side of the ice patch, the man scrambled to his feet but he was too late! The dog bit his arm and latched on!
"Hey!"
The man shook his arm but the dog refused to let go, swinging back and forth along with the arm. The man looked up. The short fat skeleton was gone! He looked back down at the angry dog. He shrugged. "Fine then, if you won't get off then you're coming with me!"
The man walked forward, the dog hanging off his arm by the teeth. The dog growled. He was doing a good job! He was a good boy! Maybe he would be pet?