His Summoner || Demon! Nightmare Sans x Reader
  • Reads 83,709
  • Votes 2,993
  • Parts 74
  • Time 17h 8m
  • Reads 83,709
  • Votes 2,993
  • Parts 74
  • Time 17h 8m
Complete, First published Aug 15, 2023
Mature
When a demon summoning goes wrong, a rich and powerful man's son gets killed and (Y/n) is forced to team up with the Demon King that did it to survive the ensuing attempts on her and her family's lives. But the King will only do it on one condition: he gets her soul. So with no choice but to die for her mistake, His Summoner promises him her soul when the job is done. | 

- Demon! Nightmare Sans x Female Reader 
- A little bit of a reverse harem with plenty of Bad Sanses x Reader moments (with a canon reason for it :D), but ultimately, (Y/n) is Nightmare's 
- Honestly you could read this with no prior knowledge of any of the characters and you'd be just fine 
- Kinda a slow burn? But don't worry, I throw in so many subtle/not-so-subtle intimate moments with all the Sanses that it makes it worth the wait :D 
- I'll throw in some bonus chapters with the other Sanses for extra (non-canon) fluff that doubles as a breather from the story, too 
- Is the relationship toxic? Maybe. I mean, this is canon Nightmare after all. But that's the beauty of a fictional story, no? 
- A lot of the symbolism and hidden meanings aren't obvious, so you might have to be on the lookout to see them (and keep in mind: Night doesn't openly show many emotions, so the devil is in the details) 
- I'm not going to spoil anything, but for all you anxious readers out there like me, I'll divulge I'm a sucker for happy endings *wink* 
- It's my interpretation of the characters (kept as canon as possible)
All Rights Reserved
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Forbidden [Nightmare!Sans x Reader] by sighnerd
52 parts Complete Mature
Warrior Cats x Undertale Multiverse Crossover ~~~~~~~~ Since the Multiverse was created, the Creators have been fighting over the AUs non-stop. It was a horrible, bloody war that lasted centuries. Many were killed and many were cast away as outsiders. One day, the Creators met in an AU called Dreamtale, and after another battle, the dead came down from the sky as spirits, and the fighting ceases. They told the Creators that were alive to unite, or they would die. So that's what the Creators did. They united. They- and their AUs inhabitants- created Clans. They all lived in Dreamtale, surrounding the Tree of Feelings. Generations passed and the Clans had never seen a war so horrible since the War of the Multiverse. They lived in an almost-harmony. Until Nightmare came along, that is. ~~~~~~~~ Hiya! It's me, Sighnerd. This idea came to me in a dream, so I'm making it a reality. I love Warrior Cats, and I love Undertale, and I tried once before to merge the two, only that didn't work because I wasn't as experienced in writing as I am now. You don't need to understand Warriors to read this! It'll all be explained. The only similarities are the fact that the Sanses (and some not-Sanses) live in Clans, follow the Warrior Code (which will be explained in the introduction), they aren't cats (that's just weird), they have the same roles (tweaked a little because they aren't cats), they follow the same customs, and some other small similarities. Kind of a slow burn. That's what I'm going for, anyway. There may be a few toxic moments, but it's Nightmare, so it's fine. Right? Art and characters (except for the Empathverse Sanses and Sigh) do not belong to me! Neither does Warrior Cats. Cover art belongs to ProductionRoxy. :D My interpretation of the characters, but I'm keeping it as canon as possible. They're tweaked a little to match the Warriors setting.
-The Forest's Girl- by pastelmelonm
32 parts Complete
(Finished!) Anyways here's the plot (Grammar is also junky) This is a nightmare sans X Fem! Reader Just to clarify, I drew '(Y/n)' in the way I imagined her to sorta look like. She does not actually look like that it's just me. You're a girl (just roll with it) who is 22 years old and you have earthly powers, (more will be explained about the powers) Your father wanted a boy instead of you and he left your mother when you were born. Chasing after another woman your father was no where in sight. Your mom found out later that he was murdered by his new wife for his money and there your mother was left a widow to care for her only daughter. At 10 she died and instead of going to an orphanage, you took care and lived in your mothers small cabin deep in the forest with a small garden of course. You always heard of the guardians who guarded the tree of feelings and for the townspeople they always spoke harshly about the one they call Nightmare. Rather Dream, he was worshipped and praised for protecting good and positive feelings. And Nightmare protected the negative ones which of course they did not want. You on the other hand saw that without sadness and loss the world would be out of balance. So you always thought of Nightmare as misunderstood. And owning a small flower shop in the town you made two baskets full of sweets, flowers, and bread, thinking of how it would be a nice thank you gift for the two guardians who protected their respectable feelings. But what you didn't know was with that simple gesture of kindness, a certain skeleton became very interested in you. This book will have you wear dresses and nightmare will of course wear clothing suitable close to the Middle Ages, so basically it's kinda like back then. There are most likely going to be errors in the grammar so please excuse them (Artwork by me) I hope you enjoy this! (Also please keep in mind that I will most likely draw the outfits + maybe some parts of the book)
Expectations and a Golden Stitch-A DreamError/Insomnia Fanfic by HappyWriter62
50 parts Complete
Dream always felt the weight of expectations on his shoulders and they've only grown worse now that he's a Star Sans. Save this AU, rescue that person, stop Nightmare over there, and make X person smile! It's a never-ending cycle of tasks and he gets asked more about why he hasn't done it sooner or defeated his brother yet than thanked for what he accomplished. He feels trapped in this position and doubts if he didn't have his positive aura that anyone would care for him. Most like him for the joy he brings or what he can give them. Nobody around him ever feels genuine without a doubt in his head. Add in the stress of protecting one Star Sans(Swap) and keeping the other(Ink) from starting trouble and you have a positive guardian ready to break under expectations. Then you have Error, the destroyer of AUs. His reputation speaks for himself and builds all the expectations he needs whenever he steps foot into another AU. He's as bad an omen as a black cat crossing your path. Others assume he is bad because of his "freakish" or glitching appearance. He has accepted these but it gets tiring when he already has the voices bossing him around or Fate reminding him that he should do more destruction. But he doesn't limit himself to destruction. He watches UnderNovela, admires the stars, and appreciates what he can. He pushes the limits of what is expected of him or disregards them completely. A trait that Dream eventually finds himself admiring in him, the known enemy of his friend. He knows that Error's feelings are genuine since he doesn't change in his presence(still an angry manchild). So when Dream gets wounded and stuck with Error on a whim, where will it take them? Will it be a mistake remaining in a hatred of enemies or will it change them both for the better? Could this admiration open Error up to corrupting Dream or will he be the influence Dream needs to against expectations and live for himself?
The Boy Who Doesn't Speak (Sans AUs) -- BEING REWRITTEN by SKSuperKitty
18 parts Complete Mature
For some reason, Ink, the Creator and Protector of the Sans AUs, has decided that some of the Sanses of the Multiverse should go to highschool again. Honestly, no one really liked the idea, especially the Bad Sanses, including Ink's enemy, Error. Prince Nightmare is one of the AUs that must repeat these years of treachery. He basically only finished his actual highschool, and is NOT looking forward to having to do it again. Luckily his brother, Prince Dream, will be coming along the journey beside him. But Nightmare and Dream Are polar opposites, so Nightmare can't really get along with his brother's friends, nor Dream get along with Nightmare's, if he had any. With rules to follow and secrets to keep, Nightmare must go through highschool and not let slip the terrible things that happen at home. But then suddenly the two princes disappear. There's no trace as to who might've taken them, either. The only one that doesn't seem concerned is their own father, the king. King Sun-Beam. What is he hiding underneath all of those jewels and fake smiles? A/N: There is lemon/smut. So all you innocent people out there-- don't worry! Because I warn you at every chapter, and right before it happens. I designed the cover, but did the not the amazing artwork of Nightmare Sans. So credit goes to that person for the art. :D Update!!!!: This story is being rewitten. I'm making another book that'll just be this one but a little different. Once that's posted, I'll make another "chapter" in this one, giving a link to the rewrite. Thank you to everyone who still reads or checks up on this book. <3333
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Nightmare X Cross | Servant Or Lover?

19 parts Complete

This is a story about two skeleton lovers. After they CROSSed paths through a NIGHTMARE. The smaller one had been stuck in an AU called X-Tale, with one person, who doesn't talk much unless they're in a FIGHT. There, the skeleton sat alone, absolutely nothing to do, and no way out. But one day, another skeleton came. He was bigger, and way stronger. The smaller skeleton asked and begged him to set him free, and he did. Only to have him work for him. And the smaller did whatever he wants, mainly because he owes him his life. It's been many years since then, and the smaller skeleton gotten used to everything, and does everything perfect. He gets certain feelings he doesn't understand. He chooses to ignore, but it only gets worse. With the smaller skeleton find out what it is? Will it get worse? Will he ignore it again? Or will he ACT?