A portal opened up in the middle of Snowdin, as Delta, along with Dust, Geno, and Color appeared out of the portal, as Dust looked around.

"Delta...remind telling us where we were supposed to be going to."

Delta than looked around, as he than spoke out.

"We were supposed to be going to where Seraphim Sans is located at. But...this is not the AU we were supposed to be going to! This strangely feels like Underfell. But a bit more...aggressive."

As Delta looked earphone, Geno and Color looked around as well. Alright they have now gotten out of the void and all of that, they are still bearing the wounds that the humans had given them both. Meaning that they still have the slash on their torso, and the injuries on their skulls, and Geno even kept the glitches on his right eye socket, as Dust spoke out.

"Something is wrong. This place feels strong, and yet...why does it feel like it had been attacked?"

As Dust said that, Geno than looked around, his left eye glowing, as he than spoke out.

"If you mean attack. Do you mean by this?"

Color, Dust, and Delta turned around and saw a bunch of Gaster Blasters in the air, one of them has a scar on the right ehe, while the other has blood on the teeth, as the 2 Gaster Blasters fired at each other. This made Dust and Delta looked stunned, as Color had a deadpan expression on his face, as he than spoke out.

"I sometime think that the problem is way to west to find for all of us."

Delta nodded, as Geno than spoke out.

"Well, forget about that. We need to go to the sight as fast as we can and see what is up."

Delta and Dust looked at each other and nodded their heads, as Dust got his Scythe of Fear ready and Delta getting his Gauntlets of Bravery ready also. Delta, Dust, Geno, and Color ran to the sight of the battle in question, as they got ready to deal with the problem.

In the middle of Snowdin, there are countless monsters that are on the ground, manny of them have been killed by spiky bones, and the bone appear to be bloody. A clash was heard, and the sound of feet skidding was heard, as snow scattered all over the place. And when the skid stop, the figure was revealed to him.

This Sans looked different from the others. He is wearing a pair of long pants with a chain on the left hip, grey slippers, a black hoodie with a purple upside down heart that looked like it had been shattered,  the sleeves are gray with purple stripes, and has a scar on the right eye.

This is none other than Scoundrel Sans, and is a resident of his AU called Malfratale. In this AU, the Monsters has. Developed a type of policy that is called to Steal or Be Stolen. And the backstory of this version of Sans is kind of sad. Scoundrel walks quietly in the forest of Snowdin where suddenly, a troop of monsters call him and asks to join them. As Scoundrel is usually alone, without "real" friends, due to the fact that he isn't like the others, he felt happy that monsters like these are interested in him. So he walks over to them and the leader, a grey monster named Nick, hugs him to show his confidence and friendship to Scoundrel. Scoundrel doesn't really understand why this gesture but it doesn't stop him from being filled with joy.

But obviously, nothing is too good for this poor skeleton, the leader shows him his "hug of friendship", but instead he plants a knife in the back of Scoundrel. Scoundrel falls down, in tears, while the 3 monsters continue to make fun of him. They belittle him, insult him, and continue to say horrible things about Scoundrel who feels stupid to believe in them.

These monsters are also jealous of Scoundrel because he has a very good defence compared to his brother who has him a very good attack. It is with all his things that Scoundrel's spirit becomes solid, and in his rage, he retaliated against the traitors, as he beats them down with as much pain and agony to them as possible. The monster that attacks him begged for mercy, but Scoundrel, blinded by rage, killed them all slowly and painfully, and they are forced to watch one of them die, and the next one yo die, until the last one is left to see his own end come to pass. Ever since that day, he goes on to behave violently towards others. Since that day, Scoundrel has been pushing back anyone who tries to hug him, for fear that one of them will attack him by surprise. Because of how violent he had became, and the LV that he had gotten, he is one of the most dangerous monsters of his AU.

He is at LV 6, which gives him 40 HP, and he holds his weapon that he uses in Melee Combat, can is a baseball bat, and he has the weapons of a usual Sans, such as the Gaster Blasters, bones, and blue magic, but his is much more stronger than a normal Sans. But Scoundrel accidentally killed some of his town's monster, all of whom had some High form of LV themselves, increasing his LV to 10, his HP to 56. Now, it is thanks to this increase of strength that it became the reason that he is prolonging the inevitable.

Scoundrel leapt backwards, as he looked to see who it is that is attacking him, and needless to say, the sight is not a pretty one. In fact, the sight disturbs even Scoundrel himself at what he is seeing before his very own eyes. He than fired a Gaster Blaster, but he than dodged another Blaster from the one that is fighting him. He than looked up and see a bunch of other bones coming up above him, as he then dodged them at the last second, before they were able to skewer him, as Scoundrel spoke out.

"You know...I've seen many fucked up monsters in my life, but none were as fucked out at you, especially one that looks like me."

The figure stepped forward, as Determination spiked out of his bones, and in his left hand, was a skull, the skull of his younger brother.

This is none other than Insanity!Sans. Insanity was a version of Sans that is created when he is subjected to a Determination experiment by his father, Gaster. When the experiment was done, Insanity went truly insane, as he than slaughter everyone in his Underground, and kept Papyrus' skull as a weapon, due to the sharp bone piercing this skull, and the worst part, is that the skull is still alive, with Insanity not caring a single damn for his brother's still alive head, and Papyrus has to suffer for it, all for no reason.

[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.]

Insanity step word forward, his left eye socket twitching, as his bloody smile filled his head, almost even being able to reach the bottom part of the sockets themselves. Insanity clenched his fists, as he than spoke out.

"Papyrus can come and play with him."

He than throws the Papyrus head, as Scoundrel, not wanting to let it hit him, than swung his Baseball bat with as much force as he can, and sends the Skull back, as Insanity Sans ran as fast as he can and tries punching Scoundrel. But Scoundrel than jumped backwards, as he than looks to see that Insanity is still coming after him, his insane smile plastered onto his face permanently, almost like a statue. Scoundrel, however, does not smile, and in fact is very creeped out by the sight, as he raised his Baseball bat and swung it. But Insanity used his fists and clashed against the Baseball bat, which has always been Scoundrel's signature weapon whenever he is not using his Gaster Blasters. Scoundrel then swung the bat at Insanity's head, causing him to spit out some blood, before he than ran forward and tried to punch him right where his soul is.

But Scoundrel raised his weapon in order to block the attack, and the best they this attack did was make him skid back. He than held his left hand into the air, as he then was able to summon his Gaster Blasters from behind him.

Scoundrel that attacked with his own Blasters, and they also have a scar on the right eye as well. Seems they are able to reflect on Scoundrel's injuries, just like how Gaster's own cracks are reflected into the Blaster's face.

"Let's see if you can survive this."

Scoundrel spoke out, as he than fired his Gaster Blasters at Insanity. But Insanity then activated his Insanity Blasters, and fired it at Scoundrel Sans' Blasters, and both Blasted clashed against each other, and the power was enough to cause the center to explode, sending both of the Skeletons backwards. But Scoundrel is not done yet. In fact, he has a lot more in store for him.

Scoundrel than made some more sharp bones that glows red, as his left eye also flares red in a pure rage. But he also feels cruelty in that he gets to inflict pain and agony onto Insanity, for his attack in his tone, as he than fired the sharp bones at him. But Insanity also has sharp bones, and launched then at Scoundrel's own, as Insanity and Scoundrel's bones collided and countered each other. Scoundrel than held the Baseball bat in a position in which he is ready to attack, as Insanity than leapt up and charged at him, with Insanity spoke out to Scoundrel.

"It now seems that the boss wants to have a meeting with the Scoundrel."

Scoundrel than gripped his bat as he than spoke out.

"Too has that when I meet him, I will cave his skull in with my bat!!"

Scoundrel than rushed in fast towards Insanity, as he than leapt onto into the air and tried to slams his skull in, only for Insanity to dodge the attack. He than appeared above Scoundrel, and tried to kick him, only for Scoundrel to block the attack with his Leg, before grabbing him by the ankle. He than swung his arms downwards, as he than slammed Insanity's body to the ground, which made Insanity take some damage. But Insanity than kicked Scoundrel's arm, forcing him to let go of him. Although, this made Insanity roll down onto the ground, as Scoundrel let's go of him, and caused a little bit of pain.

But Insanity stood up, as he grabbed onto the skull of Papyrus, and he turned around, the twisted smile on his face, as Scoundrel than stepped back, and readies himself. But what Scoundrel was not ready for, is that Insanity had sped forward, and although he swung a baseball bat at his skull, which gave him immense damage, at the same time, he got stabbed by the shark bone that is coming from the other side of the Papyrus Skull, giving even more to Scoundrel than Insanity was given pain from his bat.

"Gghhhhh..."

Although he was able to take the skull out of his body, he felt immensely weak, as that stab took out most of his HP, and he felt not as fast. He stood up, and Insanity smiled, as he than charged at Scoundrel. But Scoundrel tried to use blue magic, only to see that he can't do it with what happened to him. Scoundrel was going to die. But before Insanity can attack, all of a sudden, his soul glowed blue, and he was sent backwards, as sharp bones attacked him. Insanity looked to see what happened, only to see 4 Sanses approaching them.

[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.]

[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.]

They already had their blasters ready and fired them at Insanity, who made some bones to try and defend himself, only to be hit by the shockwave of the Blasters, which sends him flying backwards, only for Delta to go into hand to hand combat, as Delta and Insanity clashed their fists against each other. Their fists caused shockwaves to erupt from their fists as they went together, before Delta then did an uppercut, sending him into the air, with Geno stepping in and using his Blue Magic to slam him onto the ground and onto the walls of the buildings that are still intact, as Dust went over to Scoundrel and spoke out.

"Here, eat this."

He held out some Snail Pie, and Scoundrel took it. When he ate it, his HP almost became full, but it is still 1 HP behind. However, it is enough to help Scoundrel stand up, not weak anymore. He than looks at Dust and spoke out.

"Thank you, I guess. I just don't understand like, what is happening to me, especially since you guys look like me, along with him?!"

Dust than spoke out.

"We'll tell you what we know later, and even though we do not have all the answers, it will still be enough to you to understand, hopefully."

Scoundrel and Dust looked at each other, as they than were able to dodge a sharp bone coming from Insanity, as Geno continue to go into combat against this very evil Sans.

Geno than leapt up into the air, as he than fired Gaster Blasters at Insanity, who dodged it, as Geno snarled out.

"You are gonna pay for what you have done to Papyrus!"

Insanity smiled, as he than leapt at Geno, he extended his hand out in order to try and grab him, only for Geno to dodge the attack, before he grabbed Insanity, and threw him into a building, before blasting him. But Insanity is not done, as he than appeared to fight again.

As that happened, Dust came out of nowhere and punched Insanity in the face, sending him flying backwards. He grinds his entire body against the snow, as he than stood up to see Color, who has his hand out, and used his blue magic against him. He continuously slammed him multiple times, before firing sharp bones at Insanity like they are nothing more than bullets of a machine gun. Insanity got out of the way, as Color than summoned a Titan Blaster and fired at Insanity, who got hit. It is not as strong his arm arm cannon, but it is still very powerful, since it doesn't damage his body.

But Insanity is not bothered by this much, as he than stood up, and he turned around, his smile is still there, as he than crouched down, before he than leapt forward at Color, and tries to grab him. But Color than used his powers and summoned the Grablings, rainbow hands that come out of nowhere, as he then grabbed onto Insanity, and slammed him into the ground multiple times, before the Grablings had than punched Insanity hard, and sends him far away, sending him crashing down into the ground. This made Insanity feel a lot of pain from the attack, but he resumes fighting.

But as he was a orb to resume combat against Color, Dust came out of complete nowhere and landed a solid punch at his face. This hurts Insanity, as he is sent back by the force of the punch. But as he skids back, Dust made his Scythe appear, and swung it at Insanity. But Insanity swung the skull of Papyrus, using the sharp end of the bone that he pierced his brother's skull through, and used it like a knife, which clashed against the Scythe. Dust than made some vines appear out of the ground, as they tried to wrap around Insanity, only for Insanity to jump out of the way to avoid them. Insanity looks back and saw Dust, as he than smiled. Both of Insanity's eyes turned red a little bit, as he stood up and charged at him. But Dust than leapt forward, as he tries to grab Insanity, only for Insanity or punch him, causing a lot of pain, taking down a chunk of his HP, which surprised him. He did not expect for the punch to hurt. But Dust than summoned Tridents and stabbed Insanity with them, also giving him away a chunk of his HP. As that happened, Insanity dodged a bunch of spears, as Dust than swung his scythe, only for Insanity to jump over the scythe.

Insanity landed onto the ground, as he looked at Dust, before he then saw Pellets surround him, as they fired at his direction. But Insanity jumped, and launched sharp bones at Dust, only for Dust to fire purple sharp bones, causing the 2 bones to collide. The problem with this is that Insanity is also a LV 20 Monster, and although it as strong as Dust in the terms of magic, he is strong in the use of his physical strength. Dust would possibly even say that his strength wound have rivaled Horror, and would have given him immense trouble, is Dust had not been able to reach 20 himself.

Insanity had reeled his fist and punch Dust in the skull, giving him agony. But Dust returned the favor by summoning fireballs at him, causing them to detonate and explode at Insanity, before Insanity stabbed Dust with a shark bone that erupted behind him. But Dust was able to get out of the sharp bone, and he than launched a Magical Blast at Insanity, causing him to explode, before Dust spoke out.

"Hey, Delta. Mind making a portal to an empty timeline?"

Delta nodded, as he than summoned a portal behind him. And before Insanity could realize the portal is there, Scoundrel came forward and bats Insanity into the portal.

This made Scoundrel breath a little bit, as he looked around, before he than spoke out, while also turning to the group that is behind him.

"Hey, lookalikes of me. Do you mind telling as to why is happening?"

Dust than looks at Delta and gestures his head to tell him everything. Delta nodded, as he began to explain everything, but Dust tells him to remain calm so that he can process the information that he is about to be given. When he finished, Scoundrel was silent, as he looked down at the ground, unable to comprehend what he had just heard, and he continues to think about it, before he than spoke out, stunned.

"I...I don't even...I can..."

Scoundrel looked around for a little bit, seeing the dust everywhere, before he spoke.

"I won't deny it. I am not a kind person and I am not much of a merciful person, but I am not evil! I'm simply bad! But this Nightmare and his group, what is way too far! I'm a Punk that attacks to protect myself and my family, I am not a slaughterer that kills because it is fun!"

This made Dust take the opportunity, as he than spoke out.

"Well, believe me, buddy. I had done stuff that I am not very proud of myself, and even Nightmare's group tried to force me to come and join them. But you ended up doing the same thing that I had done, and that is that you had fought back against someone that works with him."

This made Scoundrel look around, as he than spoke out to the group.

"But why me? I am not enjoying any of this. Okay, maybe I do, because that is because I wanted to help my brother. And that is all I ever wanted. Not to become more worse and kill everyone for fun."

Geno than spoke out.

"Think it matters to Nightmare? You killed people, take pleasure in it, and now you had given him a reason to take you into his group, so that he can make you worse and make you one of his most important members, just because you are strong and sadistic to an extent. In fact, I wouldn't be surprised that he would force you to go into your group by any means necessary, even if it means threatening your Papyrus."

This made Scoundrel look up in stunned silence, as he never thought that Nightmare would go this far. But Nightmare is apparently very determined and will stop at nothing to try and force Scoundrel into his group. Color than spoke out.

"But...that can be different, and we can help with it."

This made Scoundrel look at the group, as he spoke out.

"How are you able to help with this?"

Dust than spoke out.

"It is a discussion that Delta and I talked about. Me and Delta, we have though it making a group to try and fight back against Nightmare, as well as recruit anyone member that is being forced into his group against their will. So, if you want, you can join our group, and you can fight back against Nightmare's group. Do you want to do that?"

Scoundrel looked around for a little bit, before he than spoke out.

"I...I don't know. I need to clean this up first...and than...I'll...I will need to think about it. I...I can't decide now. I also need to see if Paps is okay."

Dust nodded his head, as he spoke out.

"It's alright, other me, or, Scoundrel, which the other is said to you. Take your time. Decide and talk to all of us when you're ready."

Later...

Luckily for Scoundrel, His Papyrus is still alive, and is very happy to see him. He and his brother were able to clean up the mess, and luckily, the king did not find out about this incident. Although this is simply because Scoundrel wants to his wall the evidence on what happened, and even more luckily, half of Snowdin's denizens are still.

Scoundrel is seen sitting on a rock of some kind, his hands intertwined, as he began to think long and hard. His eyes purple, as he began to decide on the proposal that Dust had given to him, as Dust and the others watched, in order to see if he is ready to speak out.

About half an hour later, Scoundrel was done deciding, as he than walked up to the ground. Dust waited, as Scoundrel spoke out.

"Tell me. If I join this group, am I able to return home?"

Dust than looked at Delta and nodded, as he spoke out.

"You can. Delta can take you, though admittedly his power to make portals to other AUs do not always work. No offense, Delta."

"None taken."

Scoundrel looked at the entirety of Snowdin, as some of the monsters began to repair their homes. Scoundrel sighed, as he made a sound out of his mouth.

"Tch."

Scoundrel clearly does not like the fact that he will be needing to do to is. But since Nightmare is not gonna stop until he gets to him, and this group will allow him to leave, as he than spoke out to the group.

"Well...okay then.

...I'll join you guys."