Hey! So first, I'd like to say Happy Thanksgiving! Ah, the time of food, family, thankfulness, bad traffic...did I mention food?

Second of all, please don't kill me for not uploading last week. *dodges knife* AH! I'm sorry! But, this chapter of the story is double the length of a normal chapter! (I think...eh, it's longer than a normal chapter so...)

Anyways, on to the chapter!

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

Ten minutes before the explosion…

Sans didn't expect this to be easy.

When was anything ever easy?

As a slacker himself, Sans definitely preferred taking a well-deserved nap rather than fighting a ten foot knife wielding robot.

Suddenly, a plasma beam shot from the robot and at Sans and Natsu. Natsu leaped over the beam while Sans sidestepped it.

Welp, I nearly forgot about that beam.

And unfortunately for him, that was just half of the problem.

Sans shortcuted to Natsu's position. "hey bucko."

Natsu whirled around in surprise. "Come on man, you gotta stop doing that! That's so unfair."

Sans ignored what Natsu said. "as much of a joker as i am, please tell me you were kidding when you said you had no idea how to pull off a unison raid?"

"Um.." Natsu scratched the back of his head sheepishly. "I…wasn't?"

Great.

Another plasma beam shot at the duo. Sans's eye flashed blue as he summoned a gaster blaster. The beam of his own blaster met the robots'.

As he held the beam at bay, he said, "i thought you said you knew how this works."

"Hey, I just said I saw it work before! You were the one who agreed to this!"

While holding back the plasma beam, Sans thought about what Natsu said before shrugging to himself. He did have a point.

Also, he was too tired to gather up the will to argue against him. Holding off plasma beams while talking was more tiring than he thought it would be.

"okay bud, then here's the next question: do you have any idea at all on how to do this?"

"Erm..something about combining our magics and letting them flow together? I don't know! Lucy is supposed to be the expert on this type of stuff!"

Sans ignored Natsu as he fought to hold the plasma beam back. He could feel sweat pouring down his face. He could still hear Natsu rambling.

"I know Luce isn't here but I could just go over to where she's fighting and ask her. I bet her opponent isn't even that tough! She's probably making us do the work! Heh, tha-"

"pal, i hate to interrupt your rambling, but i'm sorta running out of beam. I'd appreciate it if you'd bring some of that firepower of yours and help out."

Natsu stopped his arguing midway. He had a sheepish expression on his face. "Oh, sorry about that."

Natsu then leaped up into the air and shouted out, "Fire Dragon Brilliant Flame!"

A large fireball flew at the robot. The robot immediately ceased the beam and turned its attention towards Natsu.

Natsu quickly followed up with a counter attack. "Fire Dragon Wing Attack!"

Flames made of wings hit the robot dead on. However, as expected, only a scratch was made on the robots' exterior.

Natsu landed on the arm of the robot. Then, he quickly realized his mistake.

Agh..my stomach is definitely not liking this..

Natsu flopped over on the arm of the robot. Natsu tried dragging himself off but it was no use. The motion sickness was too great for him to handle.

"Sans!" Natsu called weakly. "Help...me get…off the robot!"

Sans peered above and saw Natsu face down on the arm of the robot.

If Sans didn't say he was confused, he would be lying.

I'm pretty sure he didn't get hit. Why is he down like- oh yeah, didn't the wizards mention something about motion sickness?

Sans recalled a conversation they had before they went to interrogate Daku. The wizards were asking him questions about his universe, and they had somehow gotten to a conversation about Natsu's biggest weakness.

"If they were on a train or any type of transportation, then you would lose. Seriously, I don't understand how your motion sickness is that bad."

Sans didn't think much of it when they were talking about it. There wasn't much transportation in the underground other than the River Person and their boat. (Sans was also pretty sure there was some kind of duck that flew people, but what did he know? He had his shortcuts, he was fine.) Other than that, most monsters just walked to where they needed to be. So, Sans had no idea what motion sickness was like since he had never had it or witnessed it himself.

But, as Sans gazed at Natsu, he figured that Natsu's version of motion sickness was extreme.

Welp, guess I can see why his friends call him an idiot...not the smartest move on his part. Heh, but who am I to judge?

The robot had paused all of its attacks. It seemed that the controller of the robot was just as confused as Sans had been before. Sans took that opening to take a quick shortcut up to the arm of the robot. He grabbed Natsu before taking another shortcut back on the ground.

As soon as Sans placed Natsu on the ground, Natsu jumped up into the air.

"I'm cured! Sweet, solid ground, you don't know how much I missed you!"

Sans could see why the wizards were confused about Natsu's motion sickness problem.

Then, something rather unexpected happened.

The robot…began laughing.

The laugh was deep and mechanical sounding. Sans and Natsu gazed at the robot with two very different expressions on their faces.

Sans…well, he couldn't actually change his expression. But, if you looked close enough, you could see confusion on his face.

On the other hand, Natsu had a grin on his face. "Cool! It can talk!"

"i don't think that's the problem here pal."

The robot's laughter died down. "Sorry about that, but I can't believe your weakness is motion sickness! The Great Salamander, defeated by moving vehicles."

Natsu glared at the robot. "You gotta problem with that!?"

"Nope, not at all. It's just that-"

The robot suddenly stopped talking. Then, a chill ran down Sans spine. Something was wrong, Sans could feel it. Based on Natsu's expression, he could sense it too.

"Well, well, well, it looks like one of my soldiers has managed to capture one of your friends. I believe Lucy was her name?"

Natsu's expression slowly turned into one of rage. "What did you do to her!?"

The robot seemed to give them a sick grin. "Oh nothing much, but with how weak you are, I doubt you'd be able to get her back."

Then, the robot's gaze seemed to shift to Sans. "And you, we didn't expect you to be a skeleton. But nevertheless, we still need you. Turn yourself in peacefully, and maybe we'll consider giving your machine back after we've used it for our purpose."

Sans's eyes were empty voids. His left one seemed to have a faint blue glow in it. "that's never gonna happen pal. instead, how bout' you peacefully surrender to us before you regret it?"

"And give back Lucy while you're at it!"

"Sorry, but no. This is your last chance. Surrender to Midnight Barrem, or I'll be forced to take you down."

"that's not gonna happen."

"I'll never surrender to you!"

Then, with a snap of his fingers, Sans summoned a gaster blaster. Natsu prepared his attack.

"Fire Dragon Roar!"

At the same time, Sans released his gaster blaster. A beam of light and fire flew towards the robot with blinding speeds.

Then, as the beams flew towards the robot, something happened.

The beams met in the center of their paths and combined. A spiral of fire surrounded a blue laser flew towards the robot with blinding speeds. Natsu's eyes widened.

"No way…"

The beam hit the robot with a bang. The robot stumbled backwards. When the smoke cleared, a gaping hole could be seen in the robot's torso.

Sans was genuinely shocked, and that itself said a lot. "did we just…?"

Natsu pumped a fist in the air. "Hah! That'll teach em' not to mess with Fairy Tail!"

The mage and the skeleton watched as the robot slowly tumbled forwards. With all the damage it had taken, it wasn't a surprise that it couldn't stand anymore. The robot landed in a heap of limbs and metal.

"That's gotta be one of the strongest opponents I've ever faced." said Natsu with a grin.

Then, an unfamiliar voice came from the wreckage of the robot. "Well, that opponent is going to get a whole lot stronger."

A hooded figure had emerged from the wreckage of the robot. (Seriously, what was it with evil villains and hoods? At least the human Sans had fought back in the underground had a pink and purple sweater. Or was it green and yellow? Sans mentally shrugged, it didn't matter much anyways.) They stumbled a bit as they walked out of the pile of rubble before regaining their footing. If Sans had to guess, they probably sprained an ankle.

"Who are you?!" Natsu growled out. "What have you done to Lucy?!"

Though they couldn't see their face, Sans and Natsu could both feel the evil grin the person gave them.

"Oh, you're wondering what I've done to your friend. Well, I haven't done a thing. However, I can't say much about my guild. For all I know, they could've killed her already."

Natsu's fist lit up in rage. "You-!"

Sans held up a bone hand in front of him. "wait."

Natsu would've ignored Sans and charged straight at the hooded figure. Instead, something in Sans voice made him stop dead in his tracks.

Sans narrowed his eye sockets at the hooded figure in front of him. He could have sworn he heard that voice before. He just couldn't place where…

Sans decided to perform a check on the mysterious figure. Sans let his magic slowly spread over the person in front of him and lightly wrap around their soul.

Hmm…a determination soul. That's handy to know.

Then, their stats appeared in his mind.

As he read their stats, he could feel his eye lights slowly fade away. He could feel his hands starting to shake inside his pockets. He tightened them into fists to try to stop the shaking, but there was no use.

This can't be possible...

But, Sans knew it was. Suddenly, the need for him and the time travel all suddenly made sense. Sans should've known that if he got to this universe by accident, then they could have too.

Sans nearly had a panic attack right where he was standing, flashbacks of the genocide route flew through his mind.

A knife covered with dust.

A golden hallway.

"ARE YOU OFFERING A HUG OF ACCPETANCE? WOWIE! MY LESSONS ARE ALREADY WORKING!"

A hidden knife striking at the right moment…

"Papyrus! No..no..nononono-"

Sans forced himself to take a shaky breath. He could feel his body trembling all over. Natsu was beside him looking slightly concerned.

"Hey, are you okay?"

Sans wasn't okay. He wouldn't be now that he knew that they were here. The source of his nightmares, the source of all his pain was standing right in front of him.

The hooded figure watched them in amusement. "Oh Sansy, I see you've finally figured it out. Honestly, with a mind as bright as yours, I would've expected you to figure out sooner. I'm a bit disappointed in your deducing skills. After all, in all of the routes, you were the only one who seemed to know what was going on every time."

Natsu's brows furrowed in confusion, did this guy know Sans? And based on his reaction, it seemed that Sans knew them too, and not in a good way.

"You guys know each-" Natsu suddenly paused. He realized something the figure- who Sans apparently knew- said.

"I can't say much about my guild."

My guild? That could only mean one thing.

Standing right in front of them was the one and only, master of the guild, Midnight Barrem.

Natsu's expression turned into rage. This person had ordered their guild to capture Lucy, and probably did a bunch of other horrible things.

Natsu could feel his flames lighting up his whole body. "You! You're the guild master of Midnight Barrem!"

"Glad you've figured it out."

He could hear Sans next to him mutter out in shock, "midnight barrem guild master?"

"Give back Lucy now!"

With those words, Natsu went charging at the hooded figure. The hooded figure just stood there, watching Natsu run towards them.

Then, right as Natsu was about to land a hit on them, they whipped out a dusty knife. Sans recognized that knife; he knew all too well what they used that knife for.

The hooded figure blocked Natsu's punch with the knife. The flames on Natsu's fist were reflected off the knife and back towards Natsu. Natsu just stood there, not bothered by the flames at all. However, Sans nearly managed to put up a row of bones in time to shield him from the flames.

Luckily, the flames had snapped him from his dazed and shocked state. A new wave of adrenaline flowed through his skeletal body. His left eye was glowing a mix of blue and yellow. He raised his left hand and a gaster blaster appeared in the air behind him.

Natsu looked at Sans in awe. He was totally going to fight him after this.

The hooded figure chuckled before saying, "Ah, just as I remembered it."

Sans chuckled humorously. "well then, I guess you know how it goes.."

Sans paused for a beat before resuming. "it's a beautiful day outside. birds are chirping, flowers are blooming. on days like this, demons like you…"

"Should be dead where they stand."

As soon as Sans said those words, the gaster blaster behind him released it's bright, blue beam of light.

Now…

Sans watched as the hooded figure dodged the beam. They smiled and removed their hood.

Sans had faced them thousands of times before, but he still could help the small tremor that passed through his body when he saw them. They looked the exact same as when he last saw them. They still had the same red eyes, sinister grin, brown hair, and dusty knife.

The demon had finally unveiled itself.

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

The human grabbed their knife and jabbed at Sans. As usual, Sans side-stepped the blow. Then, the grin on the human's face widened as they pulled their knife back and sliced in the air in front of them.

"nice try kid, but you'll have to-" Sans's eye sockets widened as he saw what was coming towards him. The knife the human had sliced in the air had a red energy blast come out of it in the shape of their slice path. The blast came towards Sans with blinding speeds. Sans threw himself to the ground. The blast hit the tree behind him.

Sans watched with dread as the tree instantly got cut in half by the blast. He whirled his skull around towards the human.

"You're not the only one that's picked up a few tricks since you've got here. I mean, I can't believe that half of this universe's population can use magic."

Sans felt the familiar feeling of hopelessness settle back in his body. They were never going to win now.

Gray could feel his movements getting sluggish as he jumped back to avoid another fireball that had been sent hurling at his face.

"Ice Make Cannon!"

A cannon made of ice shot out part of the table they'd been using for poker. Tekishita gritted his teeth and waved his hands in front of him. A barrier shot around him just as the corner of the table flew towards him. The corner crashed into the barrier before bouncing back onto the ground.

Tekishita then waved his hands again. A bunch of jagged rocks appeared beneath Gray. Gray couldn't jump away in time to dodge it; he was too tired. The rocks hit him with their full force. Gray felt his body fly up into the air before landing on the ground with a hard thump.

Gray struggled to push himself up onto his feet, but he managed to get up. However, as soon as he did, a spray of scorching hot water forced him back down on his face.

Gray gritted his teeth. He knew the fight against Tekishita wouldn't be easy, however it was much harder than he had anticipated.

Gray tried to analyze any weaknesses in Tekishita's magic so he could bring him down. But, there was one problem.

He had no idea what type of magic Tekishita used.

At first, he assumed it was ring magic because of the ring Tekishita wore to try and win their game of poker.

However, he was quickly proved wrong when Tekishita summoned fire that melted all of his ice lances.

It seemed like whatever Gray threw at him, he would always have a way to counter back. And, he would counter back hard. Because of that, Gray had no clue how to defeat him.

As he tried to force his body back up, he could feel the grin that Tekishita was giving him. He pushed up against the ground in an effort to get back up. Just as he was about to get up, something slammed into Gray's back, knocking the air out of his lungs and forcing him to resume his position on the ground.

Gray glared at Tekishita who currently had his foot on Gray's back.

Tekishita leaned close to Gray's ear and whispered, "Who's the winner now, little fairy?"

Gray felt a grin tug his lips. "I am."

Then, with a burst of speed, Gray used one of free hands to pull Tekishita's leg out from underneath him. Tekishita fell to the ground with a yelp of surprise. Gray used the short frame of time to get back up on his feet.

"You forgot to pin down my hands." Gray said as he looked down on Tekishita. "With someone as smart as you, I thought you would've done that first."

Tekishita grunted from his position down on the ground. "True."

"Looks like you weren't as smart as you thought you were."

Tekishita just raised an eyebrow. Then, he laughed. Gray felt his body tense up. Something was wrong.

"You see little fairy, I am as smart as you thought I was. Goodbye."

Then, with a blink of an eye, Tekishita vanished and appeared a distance away from Gray. Gray charged at Tekishita.

Suddenly, right before he reached him, Gray crashed and fell down.

"What the-!"

Gray looked at what he had crashed into. But, there was nothing there. He tried going through again, but it was like an invisible wall had appeared in front of him.

Gray's eyes widened in horror. He tried moving around it, but found that there was a wall blocking him from moving that direction too. Gray tried moving every direction but found an invisible wall blocking his every path.

Gray looked down and saw what he expected; runes littered the ground around him in the shape of a square. He glared down at the runes on the ground.

It was official; he was trapped in an invisible cage.

He looked up and glared at Tekishita. "You bastard!"

Tekishita gave Gray a shit-eating grin. "I guess my intelligence level is higher than yours."

Gray pounded on the walls. "Let me out!"

"How about…no?"

Gray blasted his magic at the walls, hoping that they'd be weak enough and crumble at the magic, but deep down he knew the truth; there was no way out of this.

Tekishita sighed disappointedly and said, "I hoped for much more out of you. After all, you're the first mage to figure out my ring trick, and a mage from Fairy Tail no less. Also, you've managed to last-" Tekishita took out a pocket watch and checked the time. "Oh! You've beat the previous record by ten minutes."

Tekishita glanced at Gray's angry expression. "What? Don't be mad. That's very impressive. Unfortunately, this battle must end like all others, in death. And I'm sorry to say Mr. Gray Fullbuster, but the death will be yours."

Then, Tekishita snapped his fingers. A dozen sharp looking swords appeared all around Gray. Gray knew there'd be no way to block or dodge all of them in time.

"Goodbye Mr. Fullbuster, I hope you enjoy your time in the afterlife."

With another snap of his fingers, the swords flew towards Gray, aiming to kill.

Gray prepared himself for the blow.

The last thing he saw was the tips of the swords that Tekishita commanded.

Then, the world went dark.

Author's Note:

Disclaimer: I don't own Fairy Tail or Undertale

Wow, okay. This spiraled downwards really quickly...

But...um...hey! Guess we found out who was the guild master of Midnight Barrem. The one and only cause of Sans's depression, its the human! Looks like they upped their game too. That's not going to end well.

So, I tried to stay in character for each of our protagonists as best as I could. Sans and Natsu are probably the hardest for me to write about, especially if they're teaming up. I mean, they literally have opposite personalities. One dodges and prefers to stay out of fights while the other charges head in and looks for fights. How much more opposite can their personalities get?

Anyways, enjoy your Thanksgiving holiday everyone!

Till next time!