(Far long ago, two races ruled over Earth: HUMANS and MONSTERS. One day, war broke out between the two races. After a long battle, the humans were victorious. They sealed the monsters underground with a magic spell.

Many years later...

MT. Ebott

201X.

Legends say that those who climb the mountain never return. However, unbeknownst to those outside, there is something else that is at stake that caused the monsters problems. One fateful day, a human named Frisk, who is the 8th to fall, went down, and changed the fates of monsters forever, specially...one type of monster that is special compared to the others, named Sans.

Sans is a skeleton that lives in Snowdin. He works as a sentry for the Royal guard and has a younger brother named Papyrus. He lives in a place known as the underground where all monsters lived peacefully, until one day when a human known as Frisk fell down. They had a unique ability known as "Determination" that allows them to control time and come back from death, and they used this ability to repeatedly slaughter everyone in the underground and erase the world before bringing it back. But the runs became so terrible...it split the timeline into 2, back in the past when it involved a certain missing scientist. While Sans remained himself on the timeline that still remained the same...in the other, it was different. Sans, due to the constant genocides, has gone mad and decided to take the human down by gaining the power of LOVE himself. He destroyed and killed most of monster kind to be able to compete with them... but, that wasn't enough even after that. The human kept resetting making the skeleton forget about his mistakes and slaughter his friends again and again.

However, in both sides, there is a door in Waterfall, and while in the original timeline, Frisk opened it, in the other, the alternate Sans opened it. But the results remained the same. A mysterious figure that Sans had worked for in the past, named Gaster. Although both Gasters want the same thing, which is to kill the human, the way they do it and how they treat those that are doing it is different, with one being more ruthless and sadistic then the other. But in spite of this, their goals and care towards monster kind remains the same, even if the other is a little bit twisted in what he does. The 2 Gasters allowed born Sanses to remember what had happened, before they talk to them in aiding them, with the more ruthless Gaster talking of a forgotten experiment that will aid his Sans into defeating the human. Both Sanses agreed with their Gaster's, as they vow to stop the Genocide, and to free themselves from the nightmares they're in. But as that is happening, as the alternate Sans began killing more monsters then before instead of half like before, the alternate Gaster met with the main one when he became interested in the split. The main Gaster did not trust the alternate one, due to seeing how insane he has become, and while the alternate Gaster knows he cannot get him to trust him, he does reason with him in the fact that the both of them are the same human, just in different routes, but are still the exact same thing. Because of this, he requests an alliance, in that the both of them will merge the timelines into one single space, and after that, the timelines will RESET, and all will be normal again, but without the human interfering with their lives. The Main Gaster was skeptical, and knows better then to easily believe that he is in his side, but is still willing to oblige with this, if it meant stopping the human.

The 2 Gasters, using their powers within the void, merged the 2 Judgement Halls together in a point in time, and created a fused area within the 2, which will also fuse both vessels of the human into one single body. When the 2 Sanses met, they hated each other, especially when the main Sans saw the alternate's high LV of 20, as well as the unknown Stats he has, the both of them fought, getting even worse when the main Sans saw the state that the alternate Papyrus is in, but the 2 Gasters reigned in on them and revealed the purpose. Although the 2 Sanses clearly despise each other, more so for the main one, they agreed to align in order to stop the human, since they hate the human more then one another. Putting aside the grudge they have towards one another, both of the Sanses will make sure, that this is the Last Breath of the Genocide.)

Judgement Hall...

The Judgement Hall, the endpoint of where the human fights their most difficult adversary yet. Originally, it was royal golden in one timeline, and in the other timeline, it was a corrupted blue, but now, since the 2 timelines fused, there is now a blood red in the Judgement Hall itself, almost as thought it is stained in human blood. But there are 2 occupants inside of the hall. And they are both waiting at the end of it.

Standing at the end of the hallway, are 2 Skeletons. Both of them are wearing the same blue jacket, white sweater, black pants with white stripes, and pink slippers. But there is a difference between the 2 of them. One of them is clean, and has a left eye that flashes light blue and yellow, while the other has 2 red eyes, one that is a small red iris, and the other surrounding the light blue eye of his own, but does not flash yellow. These 2 are the same, they are Sans, but one of them is different from the other. The right will still be called Sans, but the left one, who has dust cover his clothes, he will be simply called...Murder.

Sans took a deep breath, and a wide smile is still on his face, with Murder being the same, but his smile is much more cruel and maddening then the right one. His left eye twitches a little bit, as he is eager to kill the human and put an end to their insanity once and for all.

As Murder looked around, he hears a menacing cackle next to him. He turns around, to see the Phantom of his brother, Papyrus.

Papyrus smiled menacingly, as Murder smiled back, almost gently, before he vanished, as Murder turned back towards the entrance of where the human is supposed to be at, as Sans then spoke out.

"Y'know, it's honestly feeling like hell that I have to stay with you of all people, especially after what you have done."

Murder then looks at his alternate self, as he then spoke out.

"You make it sound like I enjoy what I've done. What I did, I had to do it in order to beat and kill the kid, as well as stop the constant genocides that they kept on doing."

Sans then spoke back to him with contempt in his voice.

"Which means you became an executioner instead of the judge you were meant to be, becoming just as worse as the kid."

Murder shrugged his shoulders, as he looked unhappily, but he hides it with a smile.

"Can't argue with that. Besides, I had no other choice. Too me, being more determined then the human was the only way to stop this. I don't know what else I was supposed to do. And also, don't think you're any better, since you betrayed and killed innocent kids you befriended."

Sans narrowed his eyes, as his left eye flashed blue and yellow, before looking down and spoke out.

"Yeah, you're right. I guess I have no room for that sort of blame, it'd be hypocritical. Even so, you could have at least found another way to end this."

Murder then spoke out.

"Until now, at least. And now...now there is another way. A way that will finally put this nightmare behind me. Behind the both of us."

Sans nodded his eyes, as he closed his eyes.

"Yeah, and to finally be rid of the kid after all that they had done to us."

Murder nodded his head. But when that happened, Phantom Papyrus spoke out.

"BROTHER...THE HUMAN IS HERE!!"

This made Murder look and sees that the human has indeed arrived. And when the human arrived...at first, there were 2 humans, but when they stepped into the light, the 2 humans got closer to each other, and now, it seems that the 2 humans merged into one single human.

The human, Frisk approached, with a feeling that they are not alone for some reason. Murder then spoke out.

"Oh, the kid's finally arrived."

Sans looked at the sight of Frisk coming to them, before he smiled a little bit, as he then spoke out.

"Finally."

He then puts his hands in his pockets, Murder does the same, as they both stood strong. The moment that Frisk stepped in and sees them...they are shocked too see 2 Sanses, and yet, they feel a familiar rush of bloodthirsty intent inside of them, as Sans spoke out.

"Heya, you've been busy huh?"

Murder looked at their face, as he then spoke out.

"We see you still got the stone-faced murderous expression present, huh? Well, it isn't a surprise, considering who you are."

Both Murder and Sans were quiet, as Frisk stepped back a little bit, a little bit unsure, her are still determined to go through to the bitter end. After what must have been such an agonizing minute, they both spoke.

"How about we get to the point?"

The moment that happened, the 3 souls flashed, one which was Frisk's soul, being a right side up heart and red, the second being Sans' soul, which is upside down heart and is white, and Murder, who's soul is an upside down red soul, due to the sheer Determination inside of it.

[There should be a GIF or video here. Update the app now to see it.]

[There should be a GIF or video here. Update the app now to see it.]

Murder and Sans closed their eyes a little bit, as they then spoke out, with Sans starting first.

"So, we're back here again...back in the place we're meant to be in. It would have been a beautiful day outside, y' know..."

Murder then spoke out next.

"With the birds singing, the flowers blooming...but those are long since been deceased, because of you."

Then, Sans took a turn back

"On days like these..."

Then, back to Murder.

"Kids like you...."

Then, after a minute, the both of them have their eye sockets empty, as though the darkness within then is a black abyss, as they both spoke out.

"Should've ceased living."

The moment that happened, both Sanses raised their left hand and slammed Frisk to the frozen, as they jumped up, avoiding the bones that appeared out from the the ground, then Pellets appeared and struck Frisk all over the place, before being struck by fireballs, detonating in their face, and then are skewered by spears. Then, red bones came at them, but the entire area turned red, forcing them to try and dodge blind, as they got hit by the red bones pretty painfully, and then, a circle blaster appeared, as they spun and tried to blast them. But Frisk is able to run out of the way as fast as they can, as they almost got blasted and slashed at the same time. Frisk looked and saw how it is that they had almost got hit like that.

Murder's Trident and Sans' Blaster Arm Cannon out, which is the main reason why they almost got sliced and blasted in the first place, as Sans and Murder spoke out.

"Oh, I'm sorry. Was that a bit...too much?"

Sans shrugged his shoulders, as he then spoke out.

"Ehh, who cares? The kid deserves to have so much after what they've done."

Murder nodded his head, as he smiled a bit wider, before he then spoke out.

"Well, gotta agree with us there. Now then..."

He turns to Frisk and smiled dangerously at them, as both Sans and Murder spoke out.

"Let's get to the point, shall we."

The battle then finally begins, as Frisk then pressed the act button to check on the 2 Sanses in order to see what makes them both so different.

*Sans

ATK 1 DEF 1

Still the easiest enemy, can deal 1 damage. But it looks like he's stronger.

*Murder

ATK ??? DEF ???

The determined murderer. Why is it that his stats cannot be identified like the one we know or?

Frisk was done analyzing, but the moment that happened, Murder makes his attack, as he thrusts at them with the trident in his hand, forcing them to dodge the attack, before being forced into a green state, and having spears coming at them from different sides, forcing them to move their position. But they are forced to look at Sans, who fired his Blaster Arm Cannon, forcing them to block the attack harshly. The force of the Gaster Blaster was painful, as they are almost forced off of their feet from the sheer light and strength of it. Then, they were out of green mode, but then they turned blue and are flung to a wall, and at the same time, a Gaster Blaster attempted to incinerate them to smithereens, but they barely were able to get out of the way before they can be turned to ashes. Murder smirked, as he launched fireballs at Frisk, burning them badly, as they are sent down to the ground hard. Murder then spoke out

"Heh, kinda funny, isn't it. Had to force myself to kill everyone, all just so that I can stand a chance against ya. Too bad ya won't be given a peaceful rest when this is over. This time, we are not wasting the only chance we got."

Sans then spoke out.

"That's right, we will not let you win this time, we will get our lives back."

Frisk began to stand up, as they consumed the Legendary Hero, healing their HP, as well as increasing their ATK, before they swung their knife at both Sanses, who either dodged out of the way, or used the Trident to make a slash of his own to counter Frisk's. Sans shrugged his left shoulder, as he spoke out.

"Too bad that you made that wrong choice a long time ago. You'll never be satisfied no matter what you do."

Then, the soul is forced into yellow mode, as Murder's Gaster Blaster is shown on top, which began to spin around. Frisk got hit a little bit, but they then fired yellow bullets at the Blaster, forcing the blast to become blue, and Frisk, they then understood what to do, as they fired yellow bullets again at the Blaster. But Sans began to make it harder by firing his Blaster Arm Cannon, forcing them to dodge at the same time. Then, too ad the difficulty, fireballs are launched all over the place, and the fireballs detonate, causing 4 smaller fireballs to go up, down, left, and right, which caused them to miss a bunch of times, and causing even more agony then ever. But eventually, the attack stopped, and Frisk is now shown to have 5 HP left from the 99 that they had, and this is due to the combined bodies also combining the LV within them, making them become LV 20.  But they then took out a Butterscotch pie, and ate it, which made Sans speak out to them with disgust now present, but his voice still sounds relaxed for some reason.

"Geez, eating stuff that the old lady had made? That's so cowardly and stupid."

He then launched bones at them, as Frisk got out of the way, only for Murder to use blue magic on their soul and lifted them into the air, before born Sans and Murder manipulated space, and sends them flying throughout the judgement hall, as it extended, bones appeared from the ceiling and floor, as they got hit with it, with the travel now going diagonally up, as fireballs and spears also appeared, as they tried to hit Frisk. Then it changed back to normal, as Murder and Sans both stood strong, as Murder spoke out.

"Come on, kid. Is that the best that you can do?"

Frisk narrowed their eyes, as they stood up, and tried to attack Murder, only for Murder to swing the trident, and countered the slash. He then snapped his fingers, as the soul became purple, and web lines appeared. Whenever that happened, a combination of pellets and bones appeared, with spaces that are very small and a tight squeeze. While Frisk is able to  go through them, this was just the beginning, as they are now forced to dodge the Blaster Arm Cannon that Sans is using to try and kill Frisk as much as possible. Needless to say, Frisk is seriously having the most chaotic experience of their life, as both Murder and Sans are doing all that they can to try and kill them. When the attack ended, their HP had gotten a little bit shredded from before, as Murder and Sans went back together side-by-side, as Murder then spoke out.

"Wonder how much blood they can still spill before they collapse to the ground?"

Sans then shrugged, as he spoke out.

"Well, not sure. Bet it must be a lot of backbone for them to keep standing."

As Frisk healed, Sans used his Blue Magic to make them hit the walls and floor and ceiling, the slamming constantly hurting Frisk, as he summoned bones to try and attack them. But Frisk got out of the way. Unfortunately, Frisk is now forced to junk into platforms to keep on moving, which is difficult, as Murder has now summoned all of the magic that he has absorbed into this single part of the phase, as Frisk ends up getting burned, skewered, and punctured with everything and anything that comes their way, and their HP kept on getting sheared off bit by bit by the attacks that are coming their way, as they landed onto the ground, now lowered to 2 HP, not as close as 1, but still is sort of close here. Frisk began to stand up, as Murder then spoke out.

"Heh, I wonder how many times it must be, before you finally realize you deserve this hell, until you finally decide to stop finishing the job. But now...I understand. This job ain't finished, until one of us finishes it."

Sans then spoke out.

"And that's what we'll both be doing, bucko. We're gonna finish the job, by killing you. You constantly made us suffer in your hands for far too long, and now, after all that you have done, we're gonna make you pay."

Then, they switched to orange bones, as they send them to the human, who tries to move around, and at the same time, Gaster Blasters attacked all at once, forcing the human to keep on moving to different parts of the Judgement Hall in order to survive, but did not get away unscathed. Then, Blue Bones began to move, as the human is forced to stand still, but is then also forced to move very slightly to avoid getting hit by the Gaster Blasters, but did not avoid them completely, as their HP got sheered by the Gaster Blasters. Then, Sans and Murder appeared in between the human, as Murder stabbed the human, before using his trident to throw them into Sans, who fired his Blaster Arm Cannon at Frisk, and sheared off most of their HP. Murder and Sans looked at Frisk, who is trying to stand up, but can't...at least until they ate a Spider Donut to restore a bit of their HP. They then stood up, as they tried to swing their knife, only for Sans to dodge the attack. Then, both Sans and Murder stared down at the ground, as they began to think and remember about something. In both memories, it is of who they killed the children for Sans, and the monsters for Murder, namely the ones that he knows of. Sans and Murder looked at the human, with his smile wider then ever, as Sans spoke out.

"Welp kiddo, we hope you're ready, kiddo..."

Murder then spoke out.

"Because here, we'll give you the biggest torment that we can ever imagine for you."

Then both Sans and Murder spoke out at the same time.

"So it is time...to burn in hell."

Then, the both of them became relenting and determined, as they then began to fire Gaster Blasters all over the place, as the human began to dodge for their lives. Sans and Murder then launched more bones at Frisk, with Murder launching additional projectiles in the form of spears, fireballs, and pellets, as the human got hit with some of them. Then, when they got in close, they tried to slash Sans, but Murder used his Trident to block the attack, causing Frisk to be launched back a bit. But Sans then used his Blue Magic to force the soul to become blue, and began slam Frisk onto the walls, as Frisk jumped to avoid the bones coming out of the ground. Then, Frisk began jumping on the walls to avoid the bones coming towards them, as the bones travel across the walls. But then, Murder took the reigns, as they forced Frisk onto the ceiling, and made bones appear, as well as spears surrounding them and trying to stab them, and both pellets fireballs randomly appearing out of nowhere to attack, detonate, and make their miniature versions attack still. Sans then took control again, and made bones come again across the other wall, as Frisk does all that they can to dodge then.

Then, as Frisk jumped, Murder switched Frisk to purple mode, as they are now forced to dodge what's on the purple webs, as spears and bones appear and are present, but fireballs are occasionally launched into the section of webs, forcing Frisk to move and take a bit of damage from the miniature fireballs, and even uses an occasional blind attack that turned the entire area purple, making them get hit by the attacks that they cannot see, before Murder switches to Yellow Magic, forcing the soul to fire yellow bullets at the Blasters, this time to get them to stop moving, as the yellow bullets fire at Sans and Murder, who either counters with the Blaster Arm Cannon or with the Trident. But then the Gaster Blasters would resume movement again, and it would force Frisk to strike at the Blasters to repeat this process and try to shoot at Murder and Sans. But Murder is not done with them yet, because now he forces Frisk to enter the green mode, locking them in place, as Sans launches bones in all 4 main directions, but then, Murder would crank it up with the difficulty, as he summoned pellets at the beginning, but would then use fireballs and spears midway to the end. And due to the fact that the attack was all over the place, Frisk ended up getting hit by the attacks. But they still survived, and they are out of the phase. But Sans is now getting tired and almost about to stop fighting, while Murder, he is not as tired and is still able to go against them. Frisk then tried to launch a slash attack at Sans, but Murder got in the way and swung his Trident, parrying the attack, before speaking out.

"Well, I guess I'll have to take over."

Murder then began to charged at them, as he began to swing his Trident at then, thrusting and slicing, all in an effort to kill the human. Frisk tries to dodge, but they constantly got stabbed and pierced, even being forced to eat and heal midway through battle, although not my much HP. Murder then launched spears from the ground, but Frisk moved out of the way, only for Murder to use blue magic onto Frisk, and slammed them to another wall, and made fireballs appear below them, ready to detonate. But Frisk jumped out of the way, as the fireballs exploded, before summoning Pellets around them, the pellets being white at first, then orange, which they moved, and then blue, in which they stood still, but Murder took them by surprise as he fire bones and pierced them in the stomach, before grabbing them by the face, and launching them into a pillar, which was broke and destroyed by the sheer strength he possesses. Murder narrowed his eye sockets, as the right flared red and the left flared purple, as Frisk leapt forward and tried to swing the Real Knife at him, only for him to dodge out of the way, before he then made a bone wall in order to prevent the human from slicing at him. He then teleports in front of the human, and rose then into the air, and made platforms appear above Frisk. But he then switched them to blue mode, and made them stand upside down onto the platforms, as fireballs, bones, and spears came rushing at Frisk, forcing them to jump away, as well as occasional blue pellets surrounding them, forcing them to stand still. And then, Murder would even throw his trident at Frisk, forcing them to jump away, before the part ended. Frisk then swung their knife at, not at Murder, but at Sans who is defenseless, but Sans moved out of the way. Frisk tried again, but Murder grabbed them by the arm and threw them into a wall, causing a crater to form. However, Murder is not done yet, as Murder stabbed the trident into the ground, and Frisk jumped out of the way, as more tridents appeared onto the walls themselves. Frisk looks at Sans and Murder, and Murder is now a bit more tired then before. And this is the perfect moment that Frisk needs in order to take the both of them down, ending this battle. Frisk then rushed at the both of them, and Murder swung his Trident, as Sans dodged as well, the attack at first missed. But then...

...before they knew it, a second slash appeared to the both of them, and since Murder is too drained to block the attack, and Sans being shocked at this unexpected attack...they both got slashed across the chest...once again. Determination leaked out of their wounds, as Murder fell onto one of his knees, while Sans sat down onto the ground.

"D...Damnit...guess we really got ahead of ourselves. Heh...I guess we're ending up repeating an old habit of ours again...always being predictable."

Murder spoke out, as Determination leaked out of his mouth between the teeth, as Sans held onto his slash wound, as he spoke out.

"...Y-Y'know...I always wondered why I was alive...why a dirty killer like us keeps on going on. All we wanted is to save monsters and love a happy life."

Murder nodded, looking at Frisk with empty sockets, as he spoke out.

"And when you came along...you RESET the world constantly and made constant genocides on all of us. You played with our lives, even my brothers...who I was forced to put down along with the other members of my kind."

Sans looks at Frisk's stone-cold face, as he spoke out.

"I wanted constantly timeline after timeline, hoping that you might change...but you didn't. And now...we're condemned to suffer for eternity because of you."

Murder nodded, as he spoke out.

"Yes...and a suffering we are both forever to be forced in..."

Both Murder and Sans are silent, as Frisk was ready to put them down...before Murder spoke out.

"But...do you really think that this is all over?"

Murder's voice suddenly became stronger then ever, as Sans realized his HP's numbers are not completely empty. It is now 0.000001. He smiled, as he began to a stand up, as Murder spoke out.

"Heh...you have no idea what you are getting into, kid."

Sans smiled, as he spoke out.

"That's right. We still are not going down without a fight. Not while we still breath."

Murder then spoke again, standing up, as his power and strength began to rise a bit along with Sans.

"We told you before, we are not letting this chance go to waste, and we will not let you win this time."

Sans stood up, as he spoke out.

"You're constant genocides have gone on for too long, and it will not continue with you still alive."

Murder smirked, as he spoke out.

"We're sick of your blind desire to hurt us, we're sick of your determination, and more importantly, we are sick of your very existence."

Murder and Sans stood as strong as ever, as Sans spoke out.

"So don't expect for it to aid you now, not after all that you have done. We are not wasting this new chance we are given.

Murder chuckled a little bit, as he speaks his turn.

"Kid, you better be ready for what we'll do to you. We're only just getting started."

Sans and Murder, then both spoke at the same time, as a purple iris appeared in Murder's left eye, and Sans' left eye begins flashing again.

"And this time, we'll be the ones...that will finished the job that you had started."

At this vow, Sans and Murder...are ready for round 2. And now, the human's bad time...is now about to change to an even worse time, unlike ever before.