"A reset." Sans sighed, feeling the void continue to drip from his eye socket, "It's called a reset."

"We're finally talking about the resets," Flowey laughed.

"I feel like I'm watching some opera or some sh*t, like this explanation is taking twists and turns," Jeff said, looking over at Sally when she handed him the potato Sans had given her from Laughing Jack. "So what's a reset now?"

"Now I have to explain determination before I can get into that," Sans groaned, "There's just so much backstory and science in this, it's really complicated. Okay, so I explained earlier basically that humans don't have magic while monsters do, yeah?"

"Yup!" Sally said.

"Here," Jeff said, handing the potato to Ben.

"Basically, because humans don't have magic in their souls, they have something else that makes their souls more powerful than monsters." Sans tried to think of how he would go about explaining this. "Humans have this magical power called determination, which makes their souls more 'determined' to live and so humans can kill monsters easier than monsters can kill humans. The more determined they are to kill us, the more damage they do, and the more likely we're to do. Intent is really important to monsters, especially in healing and hurting. I have to intend to heal you or my magic won't heal you because I wouldn't want it to. Which is why it's better to get a monster to heal another monster, because if you really want to heal them, it'll work better."

"If I intend to make you happy all of the time, will it when I poke you?" Sally asked Sans.

"It would work even if I wasn't a monster!" Sans laughed, booping her nose. "But it just deals with healing and damage. Monsters don't have much determination, we barely have any. We can't even have too much, if people try to inject determination into us, we start to melt because our magical bodies can't handle it. So we aren't really 'determined' enough to kill a human compared to them. They would be more determined, and would have more intent to kill, and would kill us faster. But humans don't have the ability to use magic, so normal medical procedures don't really work on monsters. Our bodies are made of magic, they need magic to heal. It's why when I got hit by a rock before I had met Jeff, I couldn't go to a human doctor to get it healed. I had to heal it myself."

"Okay, so that means if you ever get hurt, we won't be able to heal you?" Ben asked, handing the potato to Jane. "I don't like the sounds of that."

"I shouldn't get hurt, I'm pretty strong," Sans said.

"But you just said that humans are stronger than monsters, so doesn't that mean you'd be weak to normal humans?" Tim asked.

"He caught my knife." Jane handed the potato to Eyeless Jack. "I mean, he has quick reflexes."

"And he's connected to the void, which means he can harness the void as well," Slender said, looking at the masked man. "Have you even been paying attention?"

"I z-zoned out like, awhile a-ago," Toby admitted, "Can we go s-start again?"

"No," Sans said, "But I can harness the void, so I don't have to listen to the rules of this world, per say. I have a lot of magic and I can dodge really well, not to mention my reflexes are really good. I also have fire magic, which skeletons aren't supposed to have, but I do anyway, so yeah. And the experiments the Doctor did on me weren't just on the void, but he also did experiments of determination on me."

"You said monsters melted if they got determination!" Jeff said.

"The Doc found a way to bypass that, a way I'm not going to be sharing because I've already concluded I would die with that knowledge," Sans said, "But basically he found a way to get determination into me without me melting. And so I'm the only monster in existence that has enough determination to fight them and actually win multiple times without melting and surviving afterwards. I've seen a monster manage to bypass death and get determination, but then she started to melt after too long and dusted soon after. She did manage to kill a couple of humans a few times, but it was too much for her to handle. Myself, on the other hand, can handle determination. So that means I can inject more into me without melting, and I'm way more powerful."

"Wow..." Eyeless Jack whispered, handing the potato to Tim now.

"Yeah, trust me, I know he's powerful," Flowey said, "I've fought him before. I have yet to beat him."

"Never will happen," Sans laughed, "I'm not saying I'm like as powerful as like a god or something, just that I got some skills. That's why I can heal fatal wounds, because I have a lot of magic. Don't worry about it though, I usually have it under control. It's just when I get sick that it acts a bit wonky, like how I accidentally summoned all of those bones. I promise to show you all more of my powers some other time when I'm not bleeding another world from my eye socket, but now's not exactly a good time."

"But what about the resets?" Sally asked.

"Oh, right, got a bit side tracked there," Sans said, "Anyway, so basically the underground, because of the barrier, became like a smaller universe in a sense where the time and space was different inside of it than the surface. That sorta meant the void controlled a smaller amount of time and space and people. Determination, if you have enough of it, can help tie into the void, too. Which is why I'm really good at using it, because I'm really determined. And Slender is too. But it explains why SeedEater can't teleport or do the stuff that we can, because he isn't determined. It's also how the humans were able to use the void to make the barrier, partly because of their determination. And if something went underground, and it happened to have enough determination..."

"They could go back in time, pretty much," Flowey said.

"I can only go forward, I don't think that's even possible," Slender said, "But theoretically..."

Tim handed the potato to Toby. "You mean someone had the ability to travel back in time?"

"Was it i-in a hot tub time m-machine?" Toby asked.

"Sadly, no," Sans said, "It was just Flowey."

"The weed went back in time?" Jeff asked, "How?"

"Determination, Alphys put some in me and I was created," Flowey said, "I found out that since I had determination, I could go back in time to a 'save point'."

"Like a video game?" Ben asked, tilting his head.

Sans pointed at Ben. "Yeah, actually, a lot like that. If someone had enough determination, they could go back to a previous location they were before and start all over again. This was only possible because of the circumstances of the underground, it's not possible anymore. Flowey was the first creature to ever be able to do something like that."

"I started using it for good, like going back in time to help people not fall, or to give them some hope in situations, save them some money, things like that." Flowey looked awkwardly at the floor. "I was filled with that 'do good' bullcrap."

"I mean, you should do some good, but to some extent," Sally said, "Being good always can just hurt you! That's what happened to me!"

"I figured that out," Flowey said, "I kept resetting over and over, going back in time over and over again to help every single monster. It started to get boring. Repeating the same stuff, talking to the same people, I wanted a change!"

"He just didn't know that I could remember the resets," Sans said.

"You could remember?" Eyeless Jack asked.

"He's a potato, duh," Laughing Jack said.

"The determination and void powers let me," Sans said.

"I started killing people just to see how others would react, and well..." Flowey said, looking at Sans. "I found out how much he could kill me."

"Oh thank god Sans killed him," Jeff sighed, "I really don't like the weed."

"Please, Sans, do whatever you did on Flowey on Jeff," Jane said.

"I killed him a couple hundred times, tibia honest," Sans said, glancing at the flower. "Like he kept coming back over and over again to try and beat me, but it never worked. He sorta just gave up."

"You were actually terrifying!" Flowey said.

"H-He did hide when you s-summoned the bones," Toby said, handing the potato to Hoodie.

"What am I supposed to do with this?" Hoodie asked him.

"I-I think we unconsciously s-started a-a game of hot potato..." Toby whispered.

"So technically in this timeline right now, I've only killed one person, the Doctor." Sans patted Sally's head. "But in past resets and such, I've killed Flowey and Frisk a lot."

"Frisk?" Ben asked.

"I figured as such," Slender said, "They did seem adamant on finding about your secrets. Probably to see how someone like you became powerful."

"Yeah, Frisk reset a lot more than Flowey," Sans said, "Each time I tried to threaten them to stop, they just became more determined to find out my past. And since they were a human, they had way more determination than Flowey. So they kept going back over, and over, and over again. The first couple of times they saved everyone, I've watched us escape to the surface. Hundreds of times, but Frisk would always give me that darn look of theirs and just-"

Sans sighed, forcing him shivering bones to calm down. "I just really don't like what they did. They killed everyone. I stopped them a lot, sure, but they were way more determined than Flowey. They kept coming back again, and again... and one reset, they actually managed to catch me off guard. I didn't see their second swing."

"I watched him die," Flowey said, "I thought Sans was the only hope for the underground, and he was! Frisk took so many resets to beat him, but they stuck through until they memorized every attack and plan he had. They managed to last long enough to get a solid hit."

"You... like me...?" Sally asked quietly.

Her voice was trembling.

"I died a lot of times, by Frisk," Sans said, "I can remember what it felt like, too. It's why I sometimes am up early, and it's why I used to take so many naps before. It was also why I was more depressed than usual."

"The only reason Sans fought was for his friends, and then he came to the surface and they immediately abandoned him," Flowey said, shaking his head. "He died for them before, multiple times, they never knew it."

Just like that, everyone dove on him.

《》《》《》

I know, it's been ages since the last update! I'm so sorry! I had something called a life, don't recommend it. 

But anyway, I have some updates to tell all of you. First off, I'm already like on Entry #40 of the Marble Hornets and Undertale crossover since the chapters are so short and easy to write, so keep an eye out for that being uploaded soon! And on Halloween, you might want to keep your notifications ready on my page because I have a good oneshot celebrating halloween about Undertale! It's about a spooky phone call on Halloween *ghost noises*

I usually do like 'Halloween specials' for the book I'm writing, which would be this one, but I forgot about it and it would take too long to write. However, I will be doing a Christmas special for this story, so on Christmas you will get a chapter uploaded of all of the characters in this story just celebrating Christmas together! So be excited for that!

Yeah, that's pretty much it.

Also, sorry if there's any mistakes in this chapter, I was writing while on a call with friends and I tend to accidentally write what people say. I caught it a couple of times, but I'm not sure if I caught all of them. Both of my editors are busy (again, they have lives, it must be a trend or something tbh) so I apologize if there's any mistakes like 'Sans dinner' instead of 'Sans said' because I actually wrote that because a friend of mine said the word dinner and I didn't notice.