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A story of how Tenpatch came into his own as the Prince of Negativity, and how the multiverse came to know Nightmare's heir.
- Language:
- English
- Words:
- 21,899
- Chapters:
- 8/12
- Collections:
- 2
- Comments:
- 92
- Kudos:
- 235
- Bookmarks:
- 41
- Hits:
- 3,663
Bookmarked by RandomFandomNomad
25 Jul 2026
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Wildcaught friends by SunnydayAOE
Fandoms: Undertale (Video Game), Undertale Multiverse - Fandom
08 Apr 2025
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Fresh narrowed its eye sockets–what fine control of its hosts that implied–and a growl, “are you some type of goody-goody trying to ruin my fun?”
Nightmare couldn’t help but double over in laughter, claws digging further into the body beneath him. The parasite had frozen at the sudden action, and he couldn’t help but laugh even more.
“My dear parasite,” and that felt good to say, “I am very much something else.”
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or, Nightmare decides he finds Fresh very very interesting.
Bookmarked by RandomFandomNomad
25 Jul 2026
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Made with care by SunnydayAOE
Fandoms: Undertale Multiverse - Fandom, Undertale (Video Game)
20 Apr 2026
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And Nightmare's smile was back, content with whatever conclusion he had drawn, “How about a meal, together. I’ve always wanted to be more involved in… what makes you unique.”
“What do you even mean, involved?”
“Whatever you want it to mean, darling.” He offered his hand, after a moment’s hesitation, Fresh took it. He seeped between its bones.
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or, Nightmare helps a sick Fresh take over a host
This fic was written for Fresh's 2026 birthday-- Happy birthday Fresh! Its birthday does not feature in the fic.
Bookmarked by RandomFandomNomad
24 Jul 2026
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The summer solstice is an important day to the worshippers of the sun god: Lord Dream. The preparations must be perfect or else their quaint village will suffer under his wrath. The already strenuous preparations are made even more stressful when the demon, god of the moon, Nightmare, sends his wraiths to the village, destroying and wrecking havoc within. The inhabitants are at a loss of what to do, but they simply keep going, as it's Lord Dream's will.
One man won't take it, though.
Blue.
While he isn't blessed by Lord Dream (something he wants but will never admit), his loyalty is to the village and his friends, and he'll do anything to help keep it safe. With the solstice drawing near, he makes one desperate decision: to bargain with the King of Night.
Will it be enough? Will he get Dream's blessing? Will he die in the attempt?
Or will he discover something that he wasn't meant to know?
- Language:
- English
- Words:
- 5,758
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 16
- Kudos:
- 86
- Bookmarks:
- 9
- Hits:
- 497
Bookmarked by RandomFandomNomad
24 Jul 2026
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Cross gets hungry during a late-night thunderstorm; Nightmare catches him rummaging through the kitchen.
Bookmarked by RandomFandomNomad
24 Jul 2026
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It all started with a plan: bind Ink to him, let Dream jump to his own conclusions and scavenge whatever was left of them; rebuild Ink after his own needs and desires. He really should have kept it that simple.
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6 times Nightmare was called an opportunist vs the one time he was not.
Bookmarked by RandomFandomNomad
23 Jul 2026
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Summary
A universe where Nightmare never ate the apples, and how that small choice changed the whole history of the Multiverse.
(Slow Updates)
- Words:
- 15,430
- Works:
- 1
- Bookmarks:
- 18
Bookmarked by RandomFandomNomad
23 Jul 2026
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The chaos from the X-Event finally blew over. It had been a few years in his world since the nearly apocalyptic battle for the multiverse, and it hadn't been forgotten, far from it actually, but most things had been rebuilt. There were even monuments for the lives and structures lost, but the scars were definitely still there.
Papyrus moved out, Sans stayed in his rural cottage away from everyone, Toriel and Asgore finally began to stand each other again... And every now and then, Ink would come and check up on how he was doing.
He just really wished he didn't bring trouble with him half the time.
Also, what does he mean by "babysit the guardian of negativity"?
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Inspired by this animatic on youtube!
Bookmarked by RandomFandomNomad
23 Jul 2026
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Reaper is overwhelmed.
His wedding is approaching, his child with Geno is due soon, and the family business never stops demanding his attention. The empire practically runs itself by now, both the legal side and the criminal one, but Reaper is still the head of the family, and people like him never allow themselves to look away for too long.
As if that wasn’t enough, there are still his brothers. Ink and Error are chaos incarnate, impossible to control and even harder to survive. But his biggest concern will always be the twins.
Dream and Nightmare are getting harder to keep close, and in their world, one mistake is enough to lose someone forever.
So when an unwanted suggestion about strengthening their security appears, Reaper makes a decision.
Unfortunately for Nightmare, that decision comes in the form of three former assassins being handed to him as a wedding gift for a ceremony that isn’t even his.
Bookmarked by RandomFandomNomad
21 Jul 2026
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Nightmare is the guardian of negativity by MoiMoiThePrivaty
Fandoms: Undertale (Video Game)
13 Apr 2025
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Nightmare is the guardian of negativity, one of the gods who maintains balance in a vast multiverse. Despite his dark role, he loves his life: he has friends who are like family, a cozy home, a caring brother who visits him frequently, and even a brother-in-law who is always worried about him. Over the centuries, Nightmare has built an organized diplomatic routine, and although the worlds under his protection are not perfect, balance has long been achieved.
To Nightmare, everything seemed to be in place. Or at least, that’s what he believed.
Then, the nightmares began. At first, they were rare, but soon they became more intense, more violent. In his dreams, he saw wars, destruction, deaths – and, worst of all, his loved ones suffering. And, always, he was the cause. Nightmare would wake up sweating, crying, trying to convince himself that they were just passing visions, echoes of his troubled mind.
But deep down, he knew it wasn’t just a bad dream. And no matter how stubborn he was, he couldn’t ignore what was happening for much longer.
Bookmarked by RandomFandomNomad
21 Jul 2026
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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.Bookmarked by RandomFandomNomad
21 Jul 2026
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if there was one fact EVERYONE knew about nightmare, it was that he loved drama
(a bunch of snippets of different examples of said dramatics)
Bookmarked by RandomFandomNomad
21 Jul 2026
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Ccino has a special customer who visits his cafe once a week.
Series
- Part 27 of Oneshots
Bookmarked by RandomFandomNomad
20 Jul 2026
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A collection of headcanons that I have surrounding the Bad Sanses as a poly.
Series
- Part 1 of Headcanon Fics
Bookmarked by RandomFandomNomad
20 Jul 2026
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Being stuck in an alternate universe sucks. Especially when Dust and Horror have no way to contact Nightmare and go home. Dust's magic has been acting odd ever since they got here but he's keeping it a secret. And Horror is just trying to protect the other from every monster in the underground desperate to eat. It's only a matter of time before something gives.
Bookmarked by RandomFandomNomad
19 Jul 2026
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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
Bookmarked by RandomFandomNomad
18 Jul 2026
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Dust hated Killer.
He hated the way Killer talked too loud, laughed too sharp, and always seemed to push everyone’s patience just to see who would snap first. Killer was annoying, a complete douchebag, and somehow still so goddamn attractive that it made Dust feel sick whenever he noticed it.
The worst part wasn’t Killer though. The worst part was himself.
Or: Dust's Papyrus is acting up and Dust can't handle it anymore. Good thing Killer comes to the rescue and Nightmare helps behind the scenes.
Series
- Part 4 of Undertale AU's
Bookmarked by RandomFandomNomad
17 Jul 2026
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“y’know, i’m gonna give you a nickname. we can’t both be ‘Sans,’ after all, and i was here first, so i call dibs.” Sans twirled a forkful of spaghetti and ate it thoughtfully as he watched the strange sludge sleuthing from the others’ sockets slowly turn more watery. “hm. maybe... tartarus? heheheh…”
No news was good news, they said - or rather, in this case, no answer was equivalent to silent approval.
“yeah, i thought that was a good one, too. glad we’re on the same page.”
Bookmarked by RandomFandomNomad
15 Jul 2026
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Summary
Sorry guys… :/ On Hiatus again until work slows down for the summer
- Words:
- 40,165
- Works:
- 5
- Bookmarks:
- 18
Bookmarked by RandomFandomNomad
15 Jul 2026
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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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Summary
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
- Language:
- English
- Words:
- 115,022
- Chapters:
- 24/?
- Collections:
- 1
- Comments:
- 213
- Kudos:
- 190
- Bookmarks:
- 53
- Hits:
- 7,741
Bookmarked by RandomFandomNomad
14 Jul 2026