Undertale:Crossing AUs

Prologue

Sans's POV
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The room was dark.
Yeah, I know it's not the most detailed description but cut me some slack, I'm kinda having a nightmare here.
Anyway, in that dark room there was a man, a tall dark man. But something was wrong with him?
I couldn't see his face!
I'm not talking like "Hey turn around I can't see your face". His face just wasn't there. It was like a void, a pure white blocky void. He was wearing what looked to be a lab coat. And his hands looked like somebody hand cut a perfect hole in the center of them. I could also tell he was a skeleton. Hey now I have the perfect conversation starter.
"Hey, do you ever get bonely in here", I asked. What can I say, I'm a real punny guy. But he didn't answer. He just stood there, as if he wanted to say something but couldn't find the words to do it. This went on until I decided that I had enough of this.
"Look pal, I'm trying to have a decent conversation. The least you could do is sa-"
"I've been waiting Sans", he suddenly said. This took by surprise. He never spoke before, I mean not in the dream. "You have potential, raw power just waiting to be used. Its time you saw the true extent of your powers!"
"Sorry pal I'm not interested in your offer. And how do you know my name"?
"Oh I know a lot about you Sans. I know about your past. Your present. And your future. For I can see the timelines. I can see everything you have done and ever will do"!
Timelines? What the hell is this weirdo talking about. I better wake up before he tries anything funny.
I turned around an started walking away. But something stopped me. An unexplained force kept me from moving. I struggled against it, my futile efforts only amusing my captor.
"Can you feel it Sans", he said as he walked in front of me. "That tight grip on your Soul? That force refusing to give you any freedom? You can do that to. Need is the right touch". He reached out a boney hand and tapped my Soul. At first nothing happened, then I felt a burning feeling throughout my entire body. It felt like fire, coursing through my bone. I cried out in pain, screaming for help in the dark prison within me.
But nobody came.
"Just leave me alone", I screamed
As I launched a blue attack, hoping to confuse him.
"Hahahahahaha. Do you really think that trick will work on me." he simply stood there as the attack passed through him. "Besides, I can't leave you alone. If you die, I loser tether to this world.
"Tether? What do you mean tether"?
"Oh you'll remember soon enough. Until next time, my precious chi..." his final words where cut of my consciousness faded and I awoke from the dream.

Hello people, fnickride here. I hope you enjoyed this first little part of my new book. Now the idea for this book came from a buddy of mine who wanted me to do a book about the Sans multiverse. He got me hooked on Undertale and I wanted to do something about this before but he's the one who finally pushed me to do it. So to answer some frequently asked questions. Yes, this book will have Sans jumping from timeline to timeline meeting the many other Sans along the way. He will visit the more known AUs first and I already have plans for a sequel including my friends very own AU. To save the genuine idea, I will not reveal the name until I release the sequel. That's it for today. See you lazy skeleton loving dudes later.