It felt like Tim was the only one Sans could talk to when he was in the mental hospital.

Tim had felt like the only real person, like he was the only one willing to listen. Everyone else there was too unstable, Sans didn't feel like he would be able to talk to them about anything. It was the same with his old friends and family, he never considered telling them the full truth. They wouldn't understand, and they would forget from the resets.

But this was different. It wasn't a matter of if Sans was going to tell them or not, it was just a matter of when he finally decided to tell them everything. Sans expected it to have been when he wanted to bring up the subject, but this could work. He was going to tell them anyway, this was a good segway to 'hey guys I was actually an experiment and guess what I have the void in my body as a result and basically I'm pretty powerful but I'm so lazy I never use it'.

Yeah, a good way to word it.

Slender knew that the skeleton came from a lab, and that he was tortured in that lab, but he didn't know the extent of Sans's powers or exactly what happened in the lab. And Sans knew that Frisk had told the others that Sans had killed someone before, as Jeff had told him about it. Of course the brat would go behind his back and try to pry their way to answers, they always did. There was no doubt they were still prying for answers about his past where they could, but they wouldn't find any. His path was clear, there was no relation between Sans Font and Doctor W.D Gaster. Papers only told of a scientist that built the core, and only one single file contained notes about determination. None of it related to him, he made sure of it. Thousands of resets gave him plenty of time to ensure everything was cleaned up, no one but him knew the exact details.

Not anymore.

It would have been a bit difficult to explain what was going on while his eye was dripping another world, so they had to fix the problem at hand. The brilliant solution Sans had come up with was to shove a towel into his left eye socket and just leave it there. It worked, his eye socket stopped leaking, it just hindered his ability to see out of said eye socket.

There were a lot of secrets about himself, so much so that he had no idea where to start. There was a lot to explain. Should he focus on the determination? Or how he was an experiment? Or maybe about the resets? Which reset cycle though, Flowey or Frisk? There were too many options to start with for how be became so miserable.

That wasn't a good thing, now that he thought about it. There shouldn't be this many reasons to why he was depressed constantly before Jeff forced him out of that state.

It would be the most reasonable decision to start with the determination, as it led into everything else. It even tied into the CreepyPasta, since some of them were human and had determined souls. It was from their perseverance and determination that let people like Sally carry on after death, even as a ghost, her soul refused to give up. Determination to see the outcome she wanted kept her soul alive, and her perseverance is what helped her to continue on after death in her ghost form. And it explained why the CreepyPasta were stronger than other humans, they had more determination due to their pasts. They were determined to see their lives through and to hurt others, no wonder that had so much determination. It was why people like Jeff, although human, were stronger than others older than him. It was why he was able to take on Slenderman and live, his soul was stronger than other humans. Although his main trait was bravery, his soul had more determination in it than normal humans.

That would be a good starting place to go from, it tied into them and their abilities, so it would make sense.

"Do you guys know about human and monster souls?" Sans asked to get a start on the explanation.

They were all stationed in the living room like they were having some sort of sleepover, pillows and blankets bunched up everywhere with food scattered about. Instead of their focus on the T.V, however, they were all focused on Sans, interested in what he had to say. Slender said he could wait, and that he didn't have to explain it, but Sans decided that it would be better if they did know. They didn't have to know about his nightmares or PTSD, but a basic overview would help them understand why Sans's eye was dripping.

"Magic and not magic, right?" Jeff asked, "You told me a little bit about it when we first met. Monsters use magic, and- Ben I swear to god if you kick me again."

"Stop kicking him, I wanna hear!" Sally whined, throwing a pillow at Ben.

"It's not my fault Jeff is like, all leg," Ben grumbled, scooting away from him.

"Uh, yeah, monsters souls are more magical, since our bodies are made out of magic. That's why we dust when we die, since we ran out of magic and our bodies dissolve into dust. And it's why monster souls break as soon as we're killed, since there's no magic to sustain the soul, either." Sans chose to ignore Jeff and Ben bickering as they fought over the other couch.

"And it's why you can summon things?" Jane asked.

"I know you have magic, but you've never actually shown us it," Jeff said.

"It's just attacks and defense, it's not all that different from what Laughing Jack does by summoning things from thin air, mine's just limited to my species of monster," Sans explained, a bone materializing above his hand. "It's just more 'bone' things since I'm a skeleton monster. And- I did not mean to make that many."

When Sans was sick, for some weird reason his magic output was increased without his control. By simply trying to summon a single bone attack, he was surrounded by at least twenty, all hovering around him with his blue magic. Everyone gawked at the sudden appearance of his magic while Flowey, obviously knowing just how powerful Sans could be, dove underneath the couch.

"That is totally cool as f*ck!" Jeff said, "Dude, no way!"

"I didn't know you can summon so many," Jane said.

"I can make like, a lot more, trust me," Sans said, trying to force his magic away. "I just didn't mean to make so many."

"Since you're a cute little potato, does that mean you can make potatoes? Are potatoes your source of power?" Laughing Jack asked, poking one of the bones.

"I believe the magic comes from his soul itself," Slender said, "Is that correct, Sans?"

"Yeah, we don't need something else to give us the magic, it's our own," Sans said, "I mean, we can run out, so we need stuff like rest and food to help us get it back faster. Like when people get hurt and have to rest to get better and eat a lot, it's the same."

"Can y-y-y-you make, l-like, little mini S-S-Sans a-a-a-a-and have them run around?" Toby asked, his body jerking from a painful tic.

"Aw man, I wish," Sans said, "But no, I don't even know if that's possible. But I can summon bones and move them around, which is only an ability skeletons have. And I used the soul magic on Sally while we were swimming, because skeletons can grab souls and affect the souls gravity."

"It felt ticklish," Sally added.

"I can also do some basic monster magic that all monsters can do, like healing magic, and a little bit of fire. All monsters can heal, but some can only do a little from their lack of experience. I've had a lot of practice over the years, and I've been healing you guys a lot, so I'm pretty decent. Healing sorta depends on how much magic the monster has, so not all of us can heal like, life threatening wounds. And not all of us know exactly how to heal right, so really only a handful of monsters can really help from it. I'm one of those, and I know Undyne is really good at it since she's Head of the Royal Guard and all. And I know telekinesis, like I'm able to pick up stuff with my magic. And I can do a bit of fire, too, but I'm not sure where that came from. I'm not great at it, but I'm not really sure where I picked it up. And some of my magic is involved in the void."

"That's where Slender's powers come from," Tim said, "It's the stuff coming from your eye."

"I thought it was hate juice," Sally said, "Or tears."

"We're calling it hate juice now," Ben said, pointing a finger at Sally.

"Are you... going to be okay?" Eyeless Jack asked him, "You are still sick, and... you look a little worse than usual."

"He always looks like death, he's a skeleton," Ben said.

Sans laughed at his joke, feeling his bones rattle from the movement. "Nah, I'm gonna be fine. It barely ever happens, so I should be fine. Just have to wait for it to wear off, I guess. And the whole void thing is one of my powers, so it's reacting to me being sick and just leaking from where I usually pinpoint my powers."

"What's the void?" Helen asked, finally speaking up.

"I do believe it's some sort of hole in the universe, perhaps?" Smile Dog asked.

"It's nothing," SeedEater said, lightly chewing on one of the bones Sans had failed to make disappear. "It's a layer underneath the universe where nothing exists. Nothing except for power. Whenever the void overlaps with our world, something happens. It's how both I and Slender were created, our different species originated from the void itself."

"I recognized the void power as soon as it happened, that's why I was home so quickly," Slender said.

"So, it's like a world of power? Ugh, I'm confused!" Jeff said.

"It's where nothing exists, it's just a vacuum," Sans said, "I can get why it's sorta difficult to understand, since it has to deal with Quantum Physics, but basically it's just another layer to our world. Like we have the physical world that we can touch, that's the third dimension of our world. Then there's the fourth dimension, which has to deal with time, and so forth. The void kinda deals with all of the dimensions, like it's the layer between each dimension. It's why Slender can like, do things that he can that he shouldn't be able to, because he's using the void. Because it's between the layers of reality, if you can access the void, you have a lot of power because you can avoid the traditional rules that the rule binds you to. It's why Slender can like, go through time and glitch out cameras, and how he can just appear and disappear. It's because he's using the void, he's pulling himself through the void to get to places. And it explains how he was able to pull me through time, since he pulled me through the void into the future."

"So skeletons are born from the void?" Jane asked, "Or are all monsters born from it?"

"How are things born from the void?" Sally asked, "Does it use a condom?"

"No, no, no," Ben and Jeff whispered to her, not wanting to endure another Sans revenge attack for tainting her.

"Things aren't exactly 'born' from the void, it's more of the void and the real world sometimes slip together and the void is brought into the real world through openings." SeedEater reached up a foot to scratch at his fur.

"Uh, I think I should... should have a demonstration," Sans stumbled over his worlds from his bones rattling from his sickness, looking around before he grabbed two pieces of paper off of a table with his magic and brought them over to him.

"Basically, imagine these two pieces of papers like the second and third dimension," Sans said.

"Thank you for getting a demonstration," Trender muttered.

"Hey, we have kids, it'll help," Sans said, shooting him a look. "So, you see how they're just laying on top of one another? And how all of the paper is pressed to all of the other paper, so the entire two papers are touching. That's how we have the first three dimensions, width, height, and depth. That's how we have the world we currently have. But can you see how even though the pieces of paper are together, there's still some room in between them. That's where the void comes in."

Sans took another piece of paper before crumbling it up before spreading it out again, setting the wrinkled page right between the first two pieces. "And that piece of papers the void. It separates the layers. And you can see, it's different from the others-"

"Because you wrinkled it!" Sally said.

"Yeah." He beamed at her, like a proud Father at his child. "That sorta represents how the void is, since it works differently than everything else. And since it's wrinkled, or different, some joints and edges of the paper is hitting into the other papers instead of it being flat and not impacting it. That's what it's like with the void, since instead of laying between the two layers it instead juts into it at random points. That's why some of the power and void seeps in, and that's how some mythical creatures or CreepyPasta like Slender and SeedEater were born. Their powers are from the void, so it's why they can do wonky things. Slender has more basis in the void, but SeedEater doesn't, he was just created from the power. It's hard to explain, but pretty much the void collided with the world we live in and that power and absence of space led to Slender and SeedEater. The void is really wonky, so it's hard to predict what happens whenever it interacts with this world, but some people even think the world was created because of the voids involvement with the big bang. Some natural disasters have been a bit too powerful to seem natural without an outside source, some people walking into a building to suddenly get sent back in time, and some unexplained creatures roaming about that's not human nor monster. Some people even say that the void is where demons come from, but that's a bit too religious for me."

"Do the papers mean the earth is flat?" Ben asked, "I mean, it's scientifically proven by these two pieces of paper.

"Humans," Slender sighed, shaking his head. "Always needing a reason to doubt science."

"Okay, so now I know how paper face over here was born," Jeff said, pointing over his shoulder at Slenderman. "But are you saying the void is like, touching our world through your eye randomly?"

"That's the problem," Sans said, "The void randomly interacts with our world, and it's more rare than you think. But sometimes... if you have the right technology, you can force an opening from the void in an experiment."

"Are you saying...?" Jane trailed off.

"My eye light is a forced opening from the void," Sans said, trying to keep his bones from rattling anymore. "I'm the experiment."

《》《》《》

Sorry if there's any mistakes, it's a bit longer than usual and none of my editors are online, sooooooo hopefully it's fine. And I'm going to be working on the new story and getting that out, it's just the cover I need to get and discuss some more things with my editors before we take a swing at it. So keep an eye out for that! 

I actually did research for this chapter and it ended up with me reading about freaking string theory, like I dove in deep and returned with no knowledge since the void and dimensions were a bit hard to find good information on that I could understand. Hopefully what I wrote is close enough!