1 - 20 of 282 Works in Polyamorous Bad Sanses | Nightmare's Gang (Undertale)
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Summary
The war against Nightmare has come to an end.
Negativity has receded. The multiverse can breathe again.But some battles do not end when the final blow is struck.
Stripped of the entity that turned him into a symbol of terror, Nightmare awakens in a reality that rejects him, fears him, and watches closely for the slightest mistake. To many, nothing has changed. To others, he is a threat waiting for an excuse.
As the multiverse struggles to reorganize itself, Nightmare is forced to face a role no one wants to name: negativity still exists, and someone must guide it.
Between the council’s reluctance, the quiet support of a few, and the intimate bond that emerges between him, Killer, Dust, and Horror, Nightmare learns that surviving is not the same as being accepted.
This is a story about what comes after the war. About guilt, prejudice, and balance.
And about continuing to exist when the world has already decided who you are supposed to be. -
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Nightmare knew he was not the best in the Multiverse.
Hell, he was not even good.
He was the God of Negativity, a title that followed him like a curse carved into his very bones, and it made perfect sense that someone like him would end up completely alone.
Or: Nightmare is lonely so he ends up recruiting Killer, Dust and Horror all based on misunderstandings.
Series
- Part 3 of Undertale AU's
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you get me closer to god by Tragic_gays
Fandoms: Undertale (Video Game), Undertale Multiverse - Fandom, Bad Sanses - Fandom, Dreamtale - Fandom, Dusttale - Fandom, Something New - Fandom, Horrortale - Fandom
07 Mar 2026
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after a long break from missions, dust is back on the field with the rest of the 'bad sanses'. although, it seems he has gotten rusty and ends up screwing up the job. after enraging nightmare, they learn a deep secret of dusts, and of course, the only reasonable reaction is to push this secret to its limits. toying with dusts will, and entertaining their boss.
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Dust was on his couch after yet another long day at work when he saw a blinding flash of light in his garden. Getting up he slowly approached the bay window to take a look outside... and saw four strange skeletons dressed as a viking, a noble, a knight and a Roman yelling in foreign languages at each other.
He didn't know why he opened the window nor why he invited them inside, but he did, and by doing so he sealed the beginning of a very weird adventure with his four new roommates...
Dust - Modern Time, speaks English
Horror - Scandinavian Viking, speaks Old Norse
Killer - Ancient Roman, speaks Latin
Cross - Medieval Knight, speaks Old French
Nightmare - 17th cent French Noble, speaks Classical French(Cross-posting on Tumblr ! @/mikimakiboo
Basically a story about the boys coming from different time periods and time traveling together
Short chapters but it allows me not to burn-out too fast :')
Also, time being what it is, I should specify that I did NOT use AI for anything in this story, the languages all come from long researches to translate word by word in some cases, I did it all myself without the use of AI)
Series
- Part 1 of Time Travelers AU
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Killer lived his whole life by following 3 crucial rules, what happens when he accidentally breaks all of them?
How does he cope with a world that is slipping away from him as he struggles to keep himself from spiralling?
Can he help everyone or will he fall?
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Horror hates his body, he loves his mates but thinks they would be disgusted with him. This is his thoughts and struggles with body image after something happens that makes him pull away from his lovers.
this is the first time writing and posting an actual story basically me projecting
the next chapter will be more with the others this is mostly just horror having bad thoughts -
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He was just doing a grocery run. Now, Dust got captured by the Council and is stuck with Outer as his warden/parole officer.
What sounds like it wouldn't be that bad turns into Bad Time for the hooded skeleton. -
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Nightmare wasn't too upset at the announcement of his betrothal. He had excepted long ago he would be wed, would take another at his arm to rule. He hadn't expected it to come so soon.
He has no doubt the suitors his mother will have picked out will be lovely, but not to his taste. So he is much surprised when he finds each of them have an energy he is drawn to.
And as it turns out, perhaps the biggest problem isn't picking the best of the worst, but picking between four men that he loves.
Or, put simply, its my betrothal au!
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You've always been a recluse. When you resided in snowdin, you stayed tucked up in your woodland cottage. Now you're on the surface, you stay in your cottage in the middle of the woods surrounding Ebott and you're happy to be alone.
So when an injured skeleton flips your peaceful world upside down, you're not a happy batSeries
- Part 1 of Fangs dig deep
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With no memories and nowhere to go, you’ve been shuffled from universe to universe as the secret healer of the guardian of positivity for a decade. But years without a place to truly call home would leave anyone a little stir-crazy. So when you find a knife-wielding skeleton in the woods on your morning jog, you go against your better judgement and heal him. At least he’s nice enough to pay you back with outings that are starting to feel a whole lot like dates.
Too bad that skeleton is actually one of the enemies you’re supposed to be fighting against, and your existence is about to become not-so-secret to his boss.
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Dust set his books down on the coffee table, managing to avoid collapsing. Where were the others? He looked around. The supply run had been mostly successful, but it had done a number on him. Dream had thrashed his ass, then Blue and Ink had handed it back to him neatly. There was also the problem of that human he had brought back…
This is my first fiction, so ignore it if it’s very cringe. Thanks!
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Justice is BLIND to evil doing UNSPEAKable acts of kindness by Anjel_X for silverryu25
Fandoms: Undertale (Video Game)
14 Feb 2026
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When a horrible event happens to one unfortunate AU, their saviors end up being the last people one would expect...
Why would the bad guys do such an act of kindness... and is there more to it than that... they'll just have to hope a certain Trio doesn't give them a Bad Time™ in the process...A Kustard fic with an unexpected twist in the form of a Nightmarish poly of miscreants
My Secret Santa Gyftfic for fellow Kustard and pun lover, the SANSational Silverryu!
Series
- Part 8 of Gyftmas, prompt and other BONEus events
- Part 4 of GYFTS that keep on giving
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I walked the hallway-lined with framed landscapes of cut down trees and paintings of historical mass destruction. As used to it as I have gotten, it still freaks me the fuck out. My finger traced the railing as I ascended the familiar velvet staircase, dark oak floorboards creaking with every step. I could feel my SOUL beating fast as I kept getting closer. It felt disgusting. All of these shitty feelings. I just want him to break me in order to fix me.
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One moment, you’re living a dull life, following the same routine day after day. The next, you wake up trapped in a cold, unfamiliar place, surrounded by bars and creatures that aren’t human. Your purpose here? Maid. At least, that’s what they say. But there’s more to this dark, twisted world than simple tasks. The figures watching you from the shadows have their own plans, and you're nothing more than a pawn in their game.
is this good enough or what? JUST READ IT ALREADY!
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Goodness You’re Bleeding (What A Wonderful Feeling) by Feathery_Fun
Fandoms: Undertale (Video Game)
11 Feb 2026
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Hunger was a primal thing. A way for the body to urge the brain to seek out nutrition. At some point, between the beginnings of starvation and the threat of death, the body will take over where the brain refuses. Even if death is not applicable to the body in question, hunger will always prevail over weak things like morals.
Basically, I make Dream suffer a lot because I want him to break and then have to be put together :)
No, I will not take criticism. And yes, his suffering will be long and arduous, and he will refuse help at absolutely every turn. What else is he supposed to do?
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Nightmare takes in a new pet. If Cross would just realize that it was only for his best.
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MY LOVE IS MINE by Velvet_Divine
Fandoms: Undertale (Video Game), Undertale Multiverse - Fandom
07 Feb 2026
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Cross has always loved.
He has always cared and tried to care for others.
All that's done has hurt him.
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Cross’s silent plea intensified as he watched Dream. Please, Dream, do something. He’s going to… he’s going to… The thought was too terrifying to complete. He could feel the cold metal of the file pressing against his mouth, a chilling premonition of what was to come. Cross’s bones started to shake uncontrollably as he tried to thrash the creator off of him, yet Ink just laid his weight more into him not caring about the struggle beneath him.
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Rarepair New Year - started with a little kHISS Like tHISS by Anjel_X
Fandoms: Undertale (Video Game)
20 Jan 2026
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While his men are on a lengthy mission, Nightmare decides to find a few more recruits... he might've bit off more than he could handle...
Nightmare/Bad Sans Poly (Killer/Dust/Horror/Cross)/Bad Snake Poly (Lamia!Killer/Lamia!Dust/Lamia!Horror) for Rarepair New Year 2026
Series
- Part 22 of Gyftmas, prompt and other BONEus events
- Part 3 of Rarepair New Year that's so RARE it's UNDERCOOKED
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In which all the bad Sanses, and especially Nightmare, learn that Nightmare's corruption seems to have a mind of its own.
A mind that has, apparently, decided all his lovers were important to him and therefore deserved to be protected and helped at their lowest points. Who knew ancient corrupted emotion magic would be so much better than therapy?