Sans and Rouge fell through the red vortex of energy, as try the best that the can to see what in the world is going on now. But everything is happening so fast that it is impossible to know what is going on. But they do know one thing...that this is going to be a dangerous trip for them. He than looks down at what is happening, and sees that they are about to get close to something. Sans doesn't know why...but he can guess that they are about to reach the demon's world soon. Sans clenched his fist, as he gets ready to go through the other side, and prepares for a possible right as soon as he enters through the portal.

"hopefully we're both ready for what is at the other side of this, because I am not here to die as soon as we enter.'

A portal is opened wide at the other side, as Sans and Rouge began to fall down. Okay, Sans was not ready for that, as he has no way to fly. But thankfully...Rouge is able to fly, due to her wings, and before Sans could fall to the ground, Rouge was able to grab onto Sans' hand, and fly, so that he does not fall to his death.

Sans looks up and smiles at Rouge for the fact that she had rescued him.

"Thanks, Rouge."

Rouge smiled, as she leans in to kiss Sans in the cheek. This made Sans blush purple for a bit, but he shook the feeling off, as Rouge spoke out to Sans.

"Well...you saved my life before. Figured I'd return the favor."

Sans than facepalmed a bit, as he spoke out to himself.

"I guess this is what happens when you let someone get even with you."

After a minute...they than landed on the ground, and both Sans and Rouge began to look around to see where they are at now.

It looks like an even worse version of Mobius. Sans and Rouge are actually a bit more grossed out than ever. They thought their Mobius was bad. But this...this is even worse. It was even more redder then the Mobius that they live in...if this is even Mobius at all.

"Well...looks like we're here, in the demon world."

Rouge spoke out, as Sans looked around. Clearly, it's an ugly sight to see the demon world. Sans looks down at his left sleeve, as he remembers something that he has hidden inside of it...and he than grabs it. In his mind...he has no idea how long he'll be there, nor does his know how long will it take to get out of the place they are in. So...Sans, in case he ever loses his mind, decides to do one thing. He grabs the inside of his peeve, and began the pull out something.

Sans takes out a red scarf, Papyrus's scarf from the previous timeline, from his sleeve, and puts it around himself.

He grabs onto it for a bit, as though he is afraid of the fact that it will go away from him, and he wants to keep a bit of Papyrus with him, in order to make himself feel better. He grips onto it for a little bit, but that's it. The scarf began to wave upwards, as the wind began to blow on it. The wind actually felt a tiny bit hot, but not in a painful way, which is lucky for both Sans and Rouge. He than spoke to Rouge.

"let's go and try to find a way outta here."

Rouge nodded.

"I couldn't agree more."

Sans and Rouge than began to move. But unbeknownst to them...Someone is watching them...and that person...had black tar coming out of his eyes...and they have a knife gripped rather tightly in their left hand. The person is watching the 2...or rather...more specifically...he is looking at Sans...and the red scarf that is wrapped around Sans. The figure tightens his fist, at the sight of it, before he lessened his hand, and he gets up...before he goes out of right, and...teleports.

Later...

It has been about half an hour, since they have been walking. And clearly...it is now getting any better. There are demons all over the place, but they had little trouble with them because of, first of all...many of the demons were incredibly busy with their own stuff. And second of all, the only ones that Rouge and Sans fought are the weaker demons, and they proved to be of little trouble. But they, however, do constantly getting in the way of trying to find a way out of here, and because of this, Sans had to launch them away with his powers.

As they traveled throughout the entire demonic realm, Sans looks at Rouge, who is in the air.

"are ya seein anything?"

Sans spoke out, as Rouge shook her head.

"No, I don't see anything as of lately. I don't see a portal of any kind."

Sans sighed, as clearly, luck is trying to screw up with him for some reason. Rouge landed on the ground, as they than tried to look around a bit more. Clearly, they are getting nothing as of yet, but they are still trying for get something out of this place. Also...the wound on Sans' chest has healed, so there is no worry for him to die in this place. But that does not change the fact that there are a bunch of things in this dimension that could kill him, and he is unsure if he can take them on.

As they continued walking...Sans got the sudden feeling that they are beings followed by someone. He does not know why he is feeling this...but it is really making Sans very unease of this feeling, as he has never felt that. The only  in every hit has ever made him feel that is Tails and Knuckles, and this was back on Mobius. As they are now no longer on Mobius, and are in the demon world, they are now in a very, very bad situation, as a bunch of the high-level demons could kill them at any moment, if they choose to. They are just lucky that the weaker demons are the only opponents that they have to deal with. But imagine if they have to face off against the more powerful demons. Words cannot describe how dead they'll be, and Sans has no idea just how much he can take. They are just lucky that Sans still is trying to recover his magic.

Sans and Rouge than hid behind a wooden structure, due to a high-level demon walking towards them. The both of them had to wait for a little bit, before the larger and more powerful demon was gone, and than, they resumed their walk.

"Well...we're at least the more powerful demons are busy instead of looking for us. If they weren't like that, than I don't know how anyone of us could get out of this place alive."

Rouge spoke out, as Sans nodded his head in agreement with what Rouge said.

After a minute, they than began to walk inside of an empty forest, and luckily, it seems the demons are not inside of it. But as they continued to walk around...Sans stopped for an unknown reason. Rouge turned, and saw that Sans has an annoyed look on his face, as if someone is getting in his nerves.

"Is something the matter, Hun?"

Rouge spoke out to him, as Sans spoke out in a gravely serious tone.

"We're not alone. Someone has been following us this whole time."

Sans than turned around to the direction of where that person is, and spoke out.

"i know you're there...come on out and show yourself."

But there was no movement, like it doesn't exist, like Sans is only hallucinating of what it is that is following them, and that is it. Clenching his fist, Sans than launched a bone at the tree, and than...they saw someone coming down, as they dodged the bone. They landed onto the floor of the ground, and than...they began to walk up towards the duo.

Both Sans and Rouge, they both looked behind them...and they saw the figure...his entire body shadowed, making it impossible to see what he really looks like. He is standing at the same height as Sans...but...he has something behind him, and on his chest...was a strange...soul. It had determination, which Sans sensed...but this is unlike any soul that he had seen in his life. Sans than notices the shape of it. One of the circle, a thinner one, is cover another circle, making it look like it is nothing but a target, like the person is intended for someone to hit him in that place. Sans doesn't know why...but there is something off about the presence of this figure. It feels...different...and yet...it's so familiar. This feeling is making Sans nervous, her very paranoid, as he is the only one that gets to make that feeling, and anyone else doing that...it is simply slightly nerve wracking. Sans get's his bones ready, in case he needs them.

He steps forward in front of Rouge, as he looks at the figure, before speaking out to him.

"You...who are you? And what do you want from us?"

The figure doesn't listen, but he does turn his head to look at Sans's Red Scarf. The same scarf that the Papyrus of the previous timeline had, before Sans' killed him. He than looks up to try and see Sans' face...but because the hood is up, and Sans is wearing Papyrus' large scarf, he is unable to see his face properly. He does see a little bit of his white skull, but that is it. He cannot see the face.

Than...the figure pulls out a knife from behind him, and Sans actually recognizes it.

'a knife? no...'

Sans thought as his eyes widened at the sight of it, as he remembered that...this was the weapon the human had used against his kind. He has not forgotten what the human had done though their genocides.

What the human...had made Sans do in order to stop the human by killing all the monsters, and all the people that he held dear to.

'it can't...it shouldn't be!'

Sans' left hand shakes, even though it is in his pocket, as he looks at the knife that is in this person's hand...and Sans has no idea how to deal with this, when he still has nightmares about it. He looks up at the entity...as doubt became present in his mind.

'can it?'

Sans thought out to himself, as he looks at the knife, and at the figure. The figure than charges at Sans, and tries to cut him with the knife. But Sans got out of the way, as previous instincts kicked in. He than turns around in order to speak out to Rouge.

"rouge...I want to leave this one for me to fight against, and do not fight this person. he is not someone you can beat. i am the only one that will dunk this guy down to the ground."

The entity seems to flinched when he said the word, dunk, as he looks up at Sans, who than steps forward, before speaking out with a smile on his face, while he looks both calm and insane at once.

"let's get this over with."

The entity look at Sans like he agrees with him, before charging in and trying to attack him with the knife. Sans constantly dodged and gets out of the way before the knife could have any chance of killing him.

Sans than made a bone that is cover in purple magic, and he used it to clash against the Knife that the unknown opponent was holding in his hand. Both Sans and the others entity struggled against each other, as Sans tried to overpower the strength of the person in front to him. But Sans than realized something that he now didn't expect. The entity in front of Sans, he is stronger, as he is able to overpower Sans very, very slowly. This than forced Sans to teleport from it.

Sans looks...and he saw that there are sharp objects...and the top part resembles bones!

"Huh?"

Sans spoke out, as the bones fired in his direction. Sans than extended his own hand, as 4 of Undyne's Spears appeared over Sans, and launched themselves at the bones, and both of the magical attacks destroyed each other. Sans was shocked at what he is seeing. How is he capable of summons sharp bones?

'How did that guy even do that? Is he...a skeleton?'

Sans thought to himself, as he looks back at the mysterious entity. He than opened his hand, and launched fireballs at the entity, in an effort to try and put it down. But the entity than got out of the way, and avoids the fireballs ad much as possible, before he finally was able to avoid all of them, and than tried to slice him up again, before swinging his knife, and launching an energy flash at Sans, forcing him to dodge. The same energy slash that Sans had used when he had that sword of his. Wish he can still use it, but it's not destroyed.

He than tried to pierce the chest of the entity, and at the position where the soul is at in an effort to try and kill it, but the entity realized what Sans is attempting to do, and dodged the attack as fast as it could, and Sans only pierced the ground.

'Damn it. I missed it.'

He looks, and saw that the entity is about to attack against, and Sans has no idea what to do to him next. The entity then tried to rush forward to try and slash him, but Sans avoided the slash, and punched the entity in the face. But as he did...Sans felt something on his fist. He looks at it...and he sees...black liquid.

"What? Why is there black liquid on his face?"

Sans spoke out to himself, as the entity than stood back up, and looks at Sans, and a single eye appeared on the right. And Sans...recognized it. This was an eye that he had before he committed genocide. But...why is it on this person? And more importantly...who even is he? The entity than stood up from the ground fully, as it turned around, as it than made red knives made of magic. That is not good. The knives are than launched at Sans, as he than summoned Asgore's Spear to try and counter them.

Sans than ran forward to try and attack him at close range, and he summoned another sharp purple bone, as they than both clashed at each other once again, as the bone and the knife grind at each other, sparks began to come off of bith of the weapons, as they try to overpower each other.

But as they did, and Sans jumps out of the way, the entity launched itself into the air, and tried to slam the knife down on top of Sans. Sans was able to thankfully get out of the way, and stood next to Rouge, and than...manipulated the soul of the opponent that the is fighting against so that he can turn it purple. But the problem is...this person seemed familiar with the power, as he began to avoid the bones sliding onto the purple strings like it is no big deal.

He gets out of the purple strings that trapped the entity, and rushed at Sans again, only to use a fireball to launch the entity back, before he than snapped his fingers, and changed it to a green soul. And launched bones all over the place. But it looks like the entity is familiar with this as well, and blocked the bones as much as he can, before the green soul's effect finally had left the entity. Than, Sand launched light blue bones at the entity, as he than froze in place, as to not get hit. Than, Sans tries to launch the bones at the entity, but he simply cuts it with his knife, before grabbing the last one with his own barehands. Sans than jumped back, and then made his body be covered in a blue aura, before he used his power to try and slam him into the trees, but the entity...he did something that Sans was not ready to defend against. Because as soon as he attempts to slam the entity to the ground, suddenly...a glow was seen in the top of Sans' eyes. He looks up...and he was shocked.

"what the-!"

Sans shouted out, as he dodged out of the way in order to avoid getting hit by this sudden attack the mysterious entity had done right now, suddenly.

He looks back at the entity, and spoke out to it.

"Hold on!! Where did you get that Gaster Blaster?!"

Sans spoke out, as he fired his own Gaster Blaster.

The entity got out of the way, but even he was shocked at what had just happened. Sans than lifts the entity up from the ground, before he slammed him back down, and he than tries to send him flying away. But the entity used bud knife to hold him in place, and save himself from being flung away by the gravity magic that Sans has. Sans shouts out to him.

"who are you?! and how do you have father's creation?!"

He shouted out to the entity...clearly wanting to know who this person is. He clenched his fists, as he looks at the entity. The entity looks back at Sans...and this time...he can clearly see his face...and it caught the entity by surprise for a little bit, before he stood up, and began to chuckle. Than...he spoke out..for the first time that Sans heard it.

"Such a rather...unique event."

The figure...it sounded like Sans,but a bit more of yet, her more menacing. The Red Circle began to glow even brighter, and the shadows start to get off of the person that is concealing his appearance, giving Sans a chance to see what the mysterious person looks like.

He could not believe his eyes, when the shadow is gone...and the appearance of his opponent is revealed. And needless to say...Sans has no idea wha to say.

Sans was shocked at what he was seeing right now. There is another him...yet different.

"well...things just got a lot more complicated now."