Hey guys, guess who's back?

Enjoy!

P.S I apologize for any mistakes I make in advance.

" ….he died. i watched you slice off his head." Sans turned his darkened gaze to the human. "How?"

The human giggled to themselves. "Oooh, looks like Sansy doesn't seem to know something for once! For once, I'm the one that's one step ahead." they gloated.

Sans's left eye flickered blue and yellow. A large gaster blaster appeared in the air behind him, its muzzle pointing to the human. A bright blue ball of energy was starting to form in its mouth. "Don't make me ask again." he threatened.

The human stroked their chin in thought. Then, they gave a shrug. "Why not? It's not like telling him will do any harm." they said aloud to themselves. "Plus, I can just reset if things go wrong."

Sans visibly tensed up when the human mentioned the resets. The way they kept talking about it so casually…it was like they were saying hi to a friend. In other words, it meant that they had no problem with affecting the timeline however they wanted. Though he was used to it by now, it still sickened him to hear them say it like so. If he had a stomach, it would be turning right now.

"So comedian, humor me for a bit-"

"isn't that what i've been doing this whole time?" Sans muttered to himself bitterly.

"How do you think I revived your brother? I'll give you a hint, I used something that you know I have to revive him."

Sans reluctantly dismissed his blaster as he thought about what the human said. Something that the human had? Well, friends weren't on the list; that was for sure. In fact, he could say that they were a bit bonely.

Sans mentally chuckled at his pun, but there wasn't much feeling into it. Standing right in front of the murder that slaughtered your friends and family countless of times right in front of your eyes did that to you. Sans wished he could stop that demon for good. They had abused their power for far too long. Their determination was-

Wait.

Sans recalled something that he had said to the human the last time they were in the Judgement Hall. Right after the human had mentioned his dead friends…

"you'll be surprised at what the right amount of DT can do."

Something in his non-existent brain clicked. His smile became strained at the edges and his eye sockets widened a bit before darkening. No, they couldn't have possibly-

The human noticed the change in his expression and beamed a sickening grin towards him. "You've figured it out, haven't you?" they said with a bit of eagerness. "Oh Sansy, I knew you had it in you. You were always the smart one, the one who actually knew what was going on."

"How?" Sans demanded hollowly. "how'd you figure it out? it took me years and years of research. not only that, how'd you get that ingredient? i know you don't have that on you."

The child scoffed. "The dust? That was easy. I had it all over me when you sent me into the void. Some research, deals, and some magic later, I had all the dust of every single monster in the underground."

"but how'd you get results that fast? the only way you could've done that is…if you tested them on others first." Sans said, realization creeping into his voice. He looked towards the child, angry and slightly horrified that they had gone those lengths to get what they wanted. They were truly a demon.

"Why are you so shocked by this?" questioned the human. "Alphys practically did the same thing too!"

"at least she did it for a good cause. you on the other hand, well buddy, your reasons aren't exactly justified you know?"

"Oh?" said the child while raising an eyebrow. "And what about yourself? You did nothing to stop my genocide runs through the underground, and you only stepped in at the last minute! And that was after everyone was dead! You didn't even attempt to go help your own brother!" The child stopped their spiel for a moment to glance at Sans. His eye sockets were dark and his posture was tense. "And you say my reasons aren't justified? Why don't take a look at yours?" they finished with a bit of an evil smirk.

Sans stayed silent. If he were to be honest with himself, he would say that he had those same exact thoughts too. And they were always lingering, at the back of his skull, each time he just stood there and watched. He knew he could help, he could save everyone. But ultimately, he knew there was no point. It would just be reset again, and again, and again…

"I BELIEVE IN YOU HUMAN!"

And Papyrus… he was now trapped because of his laziness, his unwillingness to try and make things better. It was all his fault-

Sans then narrowed his eye sockets at the human. This was their game wasn't it? To make him lose focus of what his goal was in the first place. Though they had their resets, they were still scared of him. They hadn't met someone who could remember and actually did something about it before.

But, before Sans could accomplish his goal, he needed to do something else first. He had to save Papyrus. He couldn't just stand by and lose him again, not while he was still standing. "you got papyrus all locked up away, and you said you'd do something to him if i didn't cooperate right?"

"Yep! Does this mean you're willing to cooperate now?" the child asked a bit too eagerly for Sans's liking.

Sans held up a boney finger in the air. "kid, i got a few questions first." Then, the mood in the air seemed to darken. The air chilled. "you said you perfected the 'revival' technique. that means that even if you kill my bro, i can bring him back."

They raised an eyebrow. "Oh yeah? And how are you going to do that? You don't know how much DT you need."

"every great scientist always writes down their work. i'm willing to bet that you did too."

"And what if I didn't?" the child shot back sharply.

"your expression says otherwise." Sans pointed out. "plus, i'm willing to bet you got a few others in on this plan of yours as well. am i right?"

The child growled in annoyance. Though lazy and not willing to put effort in most things, the comedian was actually pretty smart when he tried. Even with just a few pieces of the puzzle, he managed to figure out the solution and use it against them. Luckily, they still had a few tricks up their sleeve themselves.

"Who said my plan was to kill your brother?"

"then what? torture? Because if you do-" Sans started to threaten.

"Shut up you comedian!" the child snapped. "Let me finish. No, I'm not going to torture your brother. Well, not physically at least. It seems like everyone has some kind of healing magic nowadays." they said while rolling their eyes. "Healers always ruin-"

Sans interrupted the child's spiel. "Kid, whatever you think you're going to do to my brother, I have one word of advice for you." Sans's left eye then flashed a brilliant cyan color. "Don't." he said in a low voice.

"Wow," said the child sarcastically, "how scary. I'm quivering in my cloak over here."

Suddenly, a bright blue beam appeared and hit the area right in front of the child's feet. A gaster blaster was floating behind Sans, smoke curling out of its jaws. The child raised an eyebrow. They weren't impressed. They hadn't even flinched at all.

"Really Sansy?" the child questioned. "Using those same old tricks? I guess you've finally run out of surprises." Then, the child smirked. "Oh yes, I remember now. You've disobeyed me. Now, your brother gets it."

More gaster blasters appeared behind Sans. His eye was glowing brighter than ever. "Don't' you dare lay a hand on Papyrus."

"Who said it was going to be my hand? As much as I enjoy the feeling of my knife in monster guts, I knew you would try and step out of line when we had our talk, especially after I revealed that your brother was still alive. That's why I had one of my most trusted guild-members on stand-by."

Then, the child walked over and snatched a red button off of a nearby table. Their finger hovered over the button. "This will send a signal to my subordinate to do what is needed to be done. Now Sansy," they said with a cruel smirk, "I hope next time you feel like stepping out of line, you'll remember this moment." Then, their finger came crashing down….

…into thin air?

The child looked down in confusion and saw that the hand that was holding the red button was now empty. Their red eyes widened. What the-

"hey pal, you okay? you look mad all of a button."

The child narrowed their eyes in anger as they looked up at the comedian. His right eye winked lazily while his left eye was glowing its signature cyan and yellow colors. His left hand was out of his pocket, raised in the air with his palm facing up. A few inches above his palm was the red button, a slight blue color coating the outside of it.

The child let out a screech of rage. Why didn't they expect that? They were so stupid! Blue magic only worked on things with souls…except when it came to Sans. How could they've forgotten?! With a yell of rage, the child summoned a knife in their hands and threw it straight towards the skeleton. A shower of angry, red sparks followed the knife as it flew towards Sans.

Sans shoved the button into his coat pocket and quickly side-stepped the incoming projectile. He looked towards the kid and saw their face grow redder by the second. His grin widened, he swore he could even see steam coming out of their ears.

Suddenly, the child stopped. Their anger slowly disappeared as they began to break out into a full out laugh. They doubled over and Sans thought he even saw tears in their eyes. He let his magic slowly recced, but still on stand-by in case something happened.

The laughter slowly faded away after a few minutes. The child wiped a tear away from their eye and started a slow applause.

"You know Sansy, I have to applaud you for getting that button away from me. But, it seems that you've forgotten something." Their red eyes flashed violently and a grin made its way across their face. "You may have destroyed my reset button, but I can still reset, or load if you want to call it that, back to my save."

Sans's eye sockets widened as he realized what they said. He mentally berated himself; he had let his guard go down just when he thought he got the upper-hand. Now that mistake would cost him. When they had first reset on the battlefield, he was a bit confused. If he had destroyed their reset button, how could they still go back? In the end, he just let their determination be the answer. But, apparently he was wrong. They had another button that would let them go back to their last...save as they called it. Based on all the evidence, he assumed a save worked like the ones in a video game. He let out a growl; he knew he should've questioned their reset earlier.

Snapping out of his thoughts, Sans desperately called upon his magic. Blue sparks started to whirl behind him, a gaster blaster starting to take form.

The child summoned their load button. Their hand hovered right above it. "Now Sansy, let's make a deal. I won't go back and destroy all of you, and in exchange, all I need is your cooperation. Deal?"

Sans's eye flashed with magic. He couldn't let them go back. He didn't know when they last saved, but based on when their last load was, he would say that they would go back to the middle of their battle in the field. The demon would know everything that was going to happen, they would murder them all. He couldn't let them go back, no matter-

And like that, the solution dawned on him. He was such an idiot, the solution was right in front of his eye sockets, literally. He knew how to get rid of the demon, once and for all.

But first, he had to get out of the situation he was, and save Papyrus. He couldn't do it alone, that much Sans knew. He had to get to the Fairy Tail wizards and break them-

Suddenly, as if it was on cue, an explosion rocked the room, causing both Sans and the human to look at each other, surprised.

"What the f-"

"what's going-"

The two exclaimed their thoughts simultaneously. However, the duo was interrupted by the shouts that came from one of the nearby computer screens.

"Don't let the Fairy Tail wizards get away!"

"Crap, the master is going to kill us!"

"HOLY-!"

It was a security feed of the Fairy Tail wizards busting their way out.

The human growled and muttered to themselves, "Ugh, stupid wizards. Can't they get anything done right?" Then, they made a beeline towards the door on the other side of the room.

Sans saw what they were doing. Suddenly, with a flash of blue magic, Sans appeared right in front of the door. The human shot a glare at him and tightened their grip on their knife.

"Get out of my way comedian." they hissed verminously. "You don't need to get involved in this. After all, isn't that what you're best at doing? Sitting back and doing nothing? Also, you know there's no point to this don't you? I'll just reset and destroy you all back on the battlefield if things get out of hand."

Sans didn't budge.

"I said," they growled as red sparks started flying from their knife, "MOVE!"

Sans just stared back at them, his left eye starting to look bluer than normal.

The child gave a small huff. "Fine, then I'll just use some magic."

The child gave their sparking knife a flip. Then, they quickly drew circle in front of them with their knife. A portal outlined with red appeared. Sans could see the Fairy Tail wizards through the portal, magic flying left to right. He knew what he had to do.

His left hand flew up and a wall of bones sprung up between the portal and the human. The human looked at him and smirked. With a slash of their knife, the portal disappeared.

The tilted their head to the side. "I guess we're doing this the hard way." They paused for a second before saying, "You know, in some ways, you've changed comedian. However," they said as an evil grin spread across their face, "you're still as idiotic as ever."

"if it means saving my friends, saving my brother, then well," said Sans as he shrugged, "i guess i'll remain an idiot."

The human let out a low, dark chuckle. "You're a fool."

"And you're a murder."

"Touché."

The pair stood silently facing off against each other. Both were alert, waiting for the other to strike first. The human broke the ice by letting out a barrage of red energy blasts, using their signature knife as they pleased.

Sans ducked, dodged, and side-stepped to blasts of red magic. Once they stopped, he closed his eye sockets and stood still, hands in his pockets.

"guess it's my turn now, huh?"

The human tightened their grip on their knife, anticipation wound up in their body. "Make your move comedian."

Sans opened his eye sockets. His left eye was flashing its signature yellow and cyan colors, and his face was set in his usual smile. He took his left hand out of his pocket, and if one looked closely, they could see a slight, blue coating of magic surrounding it. The human couldn't help but grin; this was going to be a fun fight.

"you know," Sans began, "for the sake of my brother, i tried to believe that everyone could be a good person, no matter how bad they were. i tried to believe that everyone could be good, if they just tried. "

Sans then let out a low chuckle. "but now kid? now i see that i was wrong. my brother, my friends, everyone in the underground gave you a chance. but guess what?" Sans paused for a beat before saying, "You killed them without mercy."

"you may ask yourself, why am I telling you all this? well kiddo, here's the answer. i'm the judge, and right now…"

Ding.

Sans thrust his hand forwards and the child flew backwards, slamming into the far wall. Then, as Sans moved his hand back and forth, the child flew like a rag doll, slamming into the walls of the room, hard. Finally, Sans pinned the child against the wall with a few bones and summoned two gaster blasters, their muzzles pointed towards them. A familiar sound started filling the room as the blasters started to charge up.

"You need to atone for your sins."

Sans snapped his fingers and the blasters let loose, the blast hitting the child square in the face. When the blast died down, the child was still there, save for parts of their cloak that were now in steaming tatters. They were a bit scorched, but still up and working. The child had managed to get their knife up in front of them and use that as a shield to block them from the majority of the blast.

The child then moved forwards to start their turn, but was surprised when Sans flicked them back against the wall.

"What are you doing?!" they demanded heatedly, "It's MY turn now!"

Sans winked at them. "who said it was your turn? after all pal, i'm not gonna hold back anymore."

Then, Sans leveled his dark gaze towards the human. "you hurt my brother already. and then, you had the nerve to try and hurt him again. pal, you ever heard the phrase, 'fool me once, shame on you. fool me twice, shame on me'? well," said Sans, his grin widening, "let's find out happens during the third time. And I promise you, it won't be pretty."

"Well comedian," the human said, flashing him an evil smirk," I can say you got one thing wrong. Your brother is in much more danger than you realize."

"What are you talking about?"

"Let's just say that…I made some deals with people in exchange for their help."

Sans was normally a pretty chill skeleton, but this time, the demon had crossed the line. With a roar, he unleashed his magic towards the demon.

They were going to pay. After all, no one got away with hurting his brother, especially if they hurt him more than once.

Lucy smacked Natsu in the head, hard.

"You idiot!" she yelled loudly into his ear, "Why would you do that!?"

Natsu winced and rubbed the ever-growing bump on his head. "Stop complaining Luce," whined Natsu, "I got them out of the way didn't I?"

Gray face palmed and let out a long sigh. "You know Natsu, this may have been the dumbest thing you've done by far."

Natsu glared at Gray and lit up his fists. "Oh yeah frosty? How bout' whe-"

"Enough! "commanded Erza, "Gray is right Natsu. This-"she said as she waved a hand towards the unconscious guards littering the floor, "is definitely going to draw the guild's attention."

"So what?" asked Natsu as he rubbed his hands together and gave a grin, "It's gonna be more fun for us. Those guards were so weak! I can't believe this was the most powerful dark guild fifty years ago."

Lucy rubbed her temples. "Okay, first off, "she began, holding up a finger, "that was fifty years ago. Wizards have improved a lot over the years and grown stronger. Secondly, you really know nothing about this guild don't you?"

Natsu scratched his head in confusion. "What are you taking about?"

"Well," said Alphys, butting into the conversation, "the way this guild is built is pretty different from other guilds. Instead of building up, they build down underground, so it's harder for prisoners to get out."

Natsu threw his hands up in the air. "What does this have to do with the weakness of the guards?!"

"E-erm…how do I explain this…it's like a pyramid hierarchy. Think of it this way: at the bottom is where they keep the prisoners. They consider us the lowest of the low, and they have the weakest guards guard us. The next floor, which is the floor we're on now, has the next weakest guards, and well, you get the idea."

Natsu arched an eyebrow. "So…if you were to just waltz right in here, the guild master would be the first person you encounter?"

Alphys shook her head. "U-uhh, the first floor is a normal guild hall…but if you go down, there'll be trap floors. Eventually, you'd reach the guild master's office, but you'd have to get past all the traps. Not only that, they trigger alarms so the guards would come and get you…"

"But still," Gray said, "why would they have the guild master's office be the first guard floor you encounter? It doesn't really make any sense."

Alphys shrugged. "I-I'm not too sure either. To be honest, this whole layout of theirs doesn't make sense at all. But, enough about the layout, we need to get going, fast."

Erza put her hands on her hips. "I agree," she said while looking around, "but I don't see Happy here."

Lucy got worried. "What if he got captured while scoping out the area? I knew we should've sent one of us to go with him."

Gray put a reassuring hand on Lucy's shoulder. "He'll be fine, Happy's stronger than he looks. Besides, we all know that we'd just slow him down if we went with him."

Lucy slumped down in defeat. "You're right…"

Just then, Happy burst into the room, panting and breathing hard. He flew towards the groupd and landed in Natsu's arms.

"Happy!" they exclaimed as one.

Then, Natsu noticed tears prickling at the edge of Happy's eyes. "Hey, what's wrong Happy?" he asked, concerned about his friend.

Happy gave a small sniff before saying, "It was horrible! I don't know what they were doing! And the scr-"

Erza held up a hold-on gesture with her hands. "Calm down Happy, and start from the beginning."

"No!" he exclaimed, "We need to help them now! There's no time to loose!"

Then, without a word, Happy flew out of Natsu's arms and made his way back to where he came from. The group exchanged a glance before sprinting after Happy. If someone needed their help, then they would help them.

After all, they were Fairy Tail wizards, who were they to leave a person behind?

The last thing Papyrus remembered before he was plunged into this internal darkness was the human.

He remembered them listening to his words and giving him a hug. He had been so happy and proud. Wowie, he couldn't believe he had talked the human from their dark path.

But then afterwards…it was just darkness.

He remembered opening up his eye sockets and not being able to see anything. Were they even open? He tried calling for Sans, for Undyne, for anyone to come help him…..

But no one came.

He then stood up and started walking forwards. There had to be a way out of this darkness somewhere and he would get to it no matter what. His brother needed him, and he needed to go back to talk to the human.

As he walked forwards, all he saw was darkness. There wasn't even a single sign of life. But nevertheless, Papyrus wouldn't give up. His friends needed him, and the Great Papyrus never, ever gave up on anything.

It was strange; he never needed to rest while in the darkness. Even though he never really did rest, he would always at some point feel the need for some sleep. Not only that, he never felt hungry or thirsty at all. Contrary to belief, skeletons did need food and water to survive, just like any other monster.

At one point, a strange thought had crossed his mind; what if his friends really did just abandon him? What if Sans actually just left him?

Then, he immediately shook that thought out of his head. His brother would never abandon him! Undyne would never to that as well! They were both probably searching for him.

That thought only fueled the need to get back and out of the darkness. Papyrus started sprinting forwards, determined to get out and back to where he belonged.

After some time, a small, white light appeared in the horizon of the darkness. Papyrus's eye sockets widened and he quickened his pace towards the light. That had to be Sans, that had to Undyne; they had finally found him!

As ran towards the light, it seemed to get bigger and started filling up the darkness. Eventually, the darkness was replaced with the white light.

That was when the noises started.

Papyrus could only see the white light all around him, but there was a constant beeping noise in the background. He had no idea what it was. He groaned, if this was another one of Sans's pranks…

"…looks like he's almost up."

That most definitely did not sound like Sans's voice. Or Undyne's. Or anyone he knew for that matter.

"Should we add more DT?"

"And risk losing him? No way. The master would kill us!"

Papyrus frowned. If a master treated someone that way, then it was obvious they needed to be taught a lesson in friendship! He looked around. He had no idea where those voices were coming from.

"We have to put in more, or else we risk losing him again."

"Fine, get the needle prepped for .0003 grams of concentrated DT."

Suddenly, the white light faded and he saw… a gray ceiling?

He blinked a couple of times as the world came into focus. That was when he noticed he was lying down on something. He tried to sit up to see what it was but found he couldn't move his hands. He raised his head to see what was restraining him. It was a pair of cuffs strapping him down on whatever he was laying on.

"Well, well, it looks like subject 2-P is awake."

Papyrus recognized that voice as one of the voices he heard while he was in that white light. He turned his head to the side to look for the owner of the voice. His eye sockets widened in surprise as he saw…a human? Wowie, two humans in one day! What luck he was having!

He opened his mouth to greet the human. "HELLO HUMAN! MY NAME IS THE-"

"Shut up!"

Papyrus was taken aback by the tone of this human. He frowned in concern. Did something happen? Did he do something wrong? He tried consoling them again.

"HUMAN! ARE YOU OKAY? PLEASE TELL ME IF SOME-"

"Subject 2-P, you are not permitted to talk unless we specifically give you instructions to."

Papyrus had no idea what was going on. Where was Sans? Where was Undyne? Where was the small human? Maybe he could ask them…but they said for him to not talk. But nothing bad would happen right? It was just a simple question.

"ERM…HUMAN, DO YOU HAPPEN TO KNOW WHERE MY LAZY-BONE BROTHER IS-AHH!"

A small, but powerful shock ran down his spine. He could feel his HP decrease a bit. He let out a small whimper.

"Subject 2-P, did you not listen to what I said before? That is what happens if you don't comply. Do you understand?"

Papyrus gave a small nod.

"Good." Then, the human looked up and said, "Everyone, it's time to begin our testing."

Papyrus now knew that these humans were going down that same dark path that the other human was walking. But, he knew that deep down inside of them was a hint of goodness somewhere! He just had to help them find it.

Papyrus felt the shackles around his wrist being loosened. The humans made him stand up and put another pair of handcuffs around his wrists.

"HUMANS! I DO BELIE-"

Another electric shock forced him to his knees. However, he kept talking.

"-VE THAT YOU DO NOT HAVE TO-ARGH!"

The second shock that came was more painful this time, and took away more of his HP. However, none of that mattered.

He just needed to get the humans walking on the right path again. And he would keep trying, no matter what.

Author's Note:

Disclaimer: I don't own Fairy Tail or Undertale

Whew, another lengthy chapter. But, that's probably not going to happen in the future again...well, not until the school year is over that is.

Anyways, how do you think I wrote Papyrus? At first I thought it would be easy to write him...then I realized how hard it was to write a person with positive views when you're a pessimist. But seriously, poor Papyrus! I am an evil person...* cue evil laugh* Welp, anyways...

Let's talk about Sans. Sans knows the human can reset. However, he initially thought they only had one reset button that could take them back in time whenever they wanted. However, the human revealed to Sans that they have another button that lets them go back to a save... which Sans gets the gist of, based on previous data he collected and their actions right now.

So yeah, just doing a bit of explaining in case you were confused.

Till next time!