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Making A Monster by absurdmagewrites
Fandoms: Undertale (Video Game), Underfell-fandom, Underswap-Fandom, Swapfell-Fandom, Fellswap-Fandom, Fellswap Gold-Fandom, Horrortale-fandom, Crafttale-Fandom, Seaswap-Fandom
16 Nov 2025
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Summary
Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.
A skeleton monster to be precise.
With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.
What a surprise for you when you find out that someone does. A lot of someones.
- Language:
- English
- Words:
- 729,287
- Chapters:
- 93/?
- Comments:
- 4,503
- Kudos:
- 4,763
- Bookmarks:
- 1,061
- Hits:
- 278,875
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93
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Summary
Sans has put in the bone work.
For fifteen years, he's raised Papyrus.
Not even counting the time loop.
And now some pretentious ancient bones want to have a say?
Oh hell no.
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Said "ancient bones" are mortified.
How were they supposed to know the short depressed skeleton was barely two decades old?!
- Language:
- English
- Words:
- 209,106
- Chapters:
- 49/?
- Comments:
- 1,816
- Kudos:
- 1,539
- Bookmarks:
- 337
- Hits:
- 57,185
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Summary
Lust Sans has never been very proud of his AU which is often harshly judged by his fellow San's & Papyrus's. Finally they've reached the happy ending and no more resets, but what excites him even more is now that there's no longer a need for the 'heat injections' he can ask Grillby to officially be his date-mate! Unfortunately it doesn't go as planned and Sans is heartbroken.
Papyrus and the others convince Sans to come join them at Muffet's new Club/Restaurant named 'Sweets & Treats'. There Sans meets an attractive human male server who offers to be his friend, everything seems like it's looking up but there is something strange about this human...why does he smell like a female?
(I feel like Underlust is a bit under apricated because of its content, the idea that other AU's look at it differently to is kind of sad. The MC is an original character I created inspired partly by my character in Violentale. There will be a lot of various sexual and potentially triggering content I will try to mark chapters with a * if there is intense sexual content or possibly triggering material in the chapter.)
ENJOY~
- Language:
- English
- Words:
- 9,753
- Chapters:
- 5/?
- Collections:
- 1
- Comments:
- 7
- Kudos:
- 72
- Bookmarks:
- 25
- Hits:
- 1,845
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2
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(I don't think it's anymore... Like last update was on 2021 like damnnnn)
Why the good ones don't last long (*꒦ິ⌓꒦ີ)
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Summary
She loved video games with a passion. One in particular, however, always interested her the most, the one that her brother had given her to play on his recommendation: "Lover's Spat".
The game itself was simultaneously nothing special whilst being completely original. A regular cheesy dating sim with not so regular themes, like how each copy someone bought differed from one another, and many theorised that the characters were actually sentient. Of course, these were merely rumours. If only the trend of missing women from the past two years were also.
Shame Y/n would have to find out what exactly had happened to them.
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7
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7
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The reader is transported to a dating simulator where her friend lives in a mansion and the reader is the antagonist
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Bookmark Notes:
maybe for later
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Summary
I think we get the gist right ? Innocent girl,guy,them stuck with skeletons who hate them because of they're precious girlfriend,. Except there's a twist ! Your blind and your married to one of the most viscous sanses in the multiverse nightmare with his crew who care for you deeply as family and let's just when shit hits the fan it's going to be beautiful.
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Your life wasn't anything special in your opinion. Your days mostly just included going to university lectures or bumming around in your apartment. That not so slowly began to change one summer, when you happened to make eye contact with a tall, dark and handsome... skeleton? Wait, that's a lot of skeletons... and are they supposed to be this handsy?!
Now you find yourself having to handle armfuls of bones and more puns than you could count time and time again but, honestly, you couldn't be happier!
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Female!reader being pulled into lots of domestic and fluffy situations with as well as growing closer to the many different Sanses and Papyri, with some romance finding its way in there, too.
(Discontinued but to be rewritten when I have the time)Series
- Part 1 of A Really Big Bone-anza
- Language:
- English
- Words:
- 126,635
- Chapters:
- 23/23
- Collections:
- 1
- Comments:
- 277
- Kudos:
- 502
- Bookmarks:
- 167
- Hits:
- 23,249
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Summary
In a Multiverse where Ink and Error retire together after falling in love. Dream is now the new leader of the Star Sans and protector of the multiverse.
With Error no longer a threat, Dream focuses his effort in pacifying the other big threat to the multiverse, his brother Nightmare. In an attempt to cure his brother of his curse of negativity, Dream uses a rather volatile serum from a rather lewd AU.
How will this series of events play out? And how will the multiverse fair without Ink and Error?
Relationships/Ships:
Nightmare/Killer (Killermare)
Error/Ink (ErrorInk)
Underlust Papyton & Sansby-
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Best of the best nightmare x killer senses,
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Summary
Horror is starving.
Horror is starving and he won't (can't) eat and all he wants to do is die.
Worried, a bunch of people team up and make a difficult decision in order to help him. There is no telling what this might lead to, but it could have disastrous results-or be what some of them finally needed.Please read the tags!!!
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Bookmark Notes:
Low key ate, hoes mightve had all their problems solved with the concept of a breat pump but its fine /silly
The way horror is written is really cool, boarderline feral, the bare least of saniry being the only thing keeping anyone (sans!classic) safe, completly starved from food even after months of not years outside his own AU, and generally just prett angst in desperation
Also cool tidbits im stealing:
- Horror being able to reconise people based on smell
- someone who isn't used to having ecto summoned being unbalanced when they summon for the first time in a while
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Summary
You just wanted to get your dad back. And you were planning on doing it all by yourself!
Except... the fancy machine in the lab didn't lead you right to him. Instead, it led you to a bunch of skeletons looking for the same guy as you. And... there's this weird human distracting them. She's kind of mean.
What's a kid like you to do? Well, not sit back and take it!
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Bookmark Notes:
Chapter 4 - done
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Summary
In Underlust, where almost every monster is hypersexual due to being injected with lust in order to increase the monster population, Mettaton is an outsider. As a ghost, he was not injected with the lust substance, and as a result, he is completely different from everyone else in the Underground. He feels out of place as an anxious bookworm who has little interest in sex and is losing hope because his quiz show is unsuccessful. But Mettaton might not be as alone as he thinks. A certain skeleton loves Mettaton's show and wonders if anyone in the Underground shares his rare capacity to prioritize love over sex.
UNDERLUST DISCLAIMER: I think it's important to acknowledge that there are some problematic things about Underlust and that I absolutely do not condone those aspects of the AU. However, Mettaton's story in Underlust is important to me, so any senseless hatred of him or of the AU is not appreciated.
CONTENT WARNINGS: Graphic descriptions of sexual assault and attempted assault, PTSD, depression, self-harm, and suicidality. If you don't feel comfortable reading about those things, I'd highly suggest not reading this story. Please stay safe and take care of yourself!
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You live in the middle of nowhere and you like that. You have never been much of a people person and when you inherit a mansion on the mountainside far away from the bustling city of Ebott well you practically jump on the opportunity. Only keeping a few helping hands around. You've started your own business making a variety of art-based things such as paintings, pottery, commissioned drawings, knitting, and various other things. You have a perfect life, admittedly a bit lonely from time to time but that is what your cat and horse were for as well as your beloved sister who insisted on dragging you out of the house every other week to do something crazy yet fun.
That is until one of those “fun” activities ends up leading you to sponsor a couple of monsters. *Sigh* Nothing prepares you for the pun-loving skeleton and his cinnamon roll of a brother but hey at least you're getting paid for the trouble right, but wait! Wasn't there only two? Why is there 4...6...8..10.. gahhhh! How many skeletons are there and where do they keep coming from!?
Your life is about to go from 0 to 60 real fast, so buckle up buttercup.
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Running through that forest you felt relived
No more fighting no more rings
No more experiments
No more cages
And most importantly your bitty where with you
Wait…are those…more skeletons!?P.S. I edited the first chapters rearead them please!
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3
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You've been harassed constantly by your roommates, because of Dahlia. You've been pushed past your breaking point. You will have your revenge. Your gonna ruin their relationship.
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3
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It's 1935 and Myth's whole life has been nothing but hell under the heels of the Ebott Dusters Mafia. A plan is set, she and those she cares for are making a run for it, hoping to start a new life in the monster capital of the world, Omega City.
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Five Times Papyrus Had a Multiversal Guest and One Time He Visited Them Instead by Stellocchia
Fandoms: UTMV, Undertale (Video Game)
03 Oct 2024
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Summary
When Sans disappeared rumor had it that he’d jumped into the Core just like his dad had.
Papyrus heard the gossip. Even living in a relatively big city like New Home it was impossible to avoid. Sans was well known everywhere in the underground. He worked a bit here and there for multiple people. And he’d been made long ago into the right hand of the King.
He didn’t believe it though. He had figured that, eventually, Sans would contact him again and clear everything up. And then they could put that misunderstanding behind them and laugh about it over a hearty home-cooked meal.
He definitely didn’t expect Sans to just step into his living room from a big black swirling portal a couple of weeks after he’d disappeared like nothing ever happened. But he did. And he was carrying a heavy box full of soul balm and was being followed by a shorter and more shoddily-dressed copy of him with dark goop falling from his eyes and a worryingly exposed soul.
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Or Underlust Sans joins Nightmare's gang and leaves his Papyrus to collect brothers like pokemon
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This is a prequel to The Light Side of the Moon, but can be read completely independently.
Series
- Part 3 of October 2024 Fic Marathon
- Part 2 of The Light Side of the Moon Multiverse Collection
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Bookmark Notes:
Finished reading 🥰
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Bookmark Notes:
Five Times Papyrus Had a Multiversal Guest and One Time He Visited Them Instead by Stellocchia
Summary:
When Sans disappeared rumor had it that he’d jumped into the Core just like his dad had.Papyrus heard the gossip. Even living in a relatively big city like New Home it was impossible to avoid. Sans was well known everywhere in the underground. He worked a bit here and there for multiple people. And he’d been made long ago into the right hand of the King.
He didn’t believe it though. He had figured that, eventually, Sans would contact him again and clear everything up. And then they could put that misunderstanding behind them and laugh about it over a hearty home-cooked meal.
He definitely didn’t expect Sans to just step into his living room from a big black swirling portal a couple of weeks after he’d disappeared like nothing ever happened. But he did. And he was carrying a heavy box full of soul balm and was being followed by a shorter and more shoddily-dressed copy of him with dark goop falling from his eyes and a worryingly exposed soul.
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Or Underlust Sans joins Nightmare's gang and leaves his Papyrus to collect brothers like pokemon
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This is a prequel to The Light Side of the Moon, but can be read completely independently.
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Summary
[Y/N] [L/N] is a powerful mage with a bloodline well-known throughout the ages and her family have always been celebrated. They, however, despise how their bloodline trapped monsters beneath the ground. But, that is for another day. In not being able to afford basic accommodation for university, they had to rely on an old (and terrible) friend named Bethany. For some reason, most of Bethany's skeleton mates despise [Y/N] but why is that? Apart from the fact she is a mage?
Just because she has a kindness soul, it doesn't mean she will stand for their bullshit.- Language:
- English
- Words:
- 88,885
- Chapters:
- 44/?
- Comments:
- 251
- Kudos:
- 1,008
- Bookmarks:
- 216
- Hits:
- 40,875
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Bookmark Notes:
Ch 34
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Summary
P̰̙͐ropȩ̺᷿͊᷈᷈̐r᷇t̢̉y̯ of̬̊ ͑͠E̶᷁r͙ͤr̶͖ỏ͍̚rͪ
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Rë́t̗̦̣ͪ͗͘u̯̚r̥̬̰̿̉᷈n ͡I̎᷉̅ͤf̰ F͎͙̓̂͠oůn̹᷊͙̂̄dͧDO ̴̝̖͘NO̒T̗͠ ̗̃R͑EAD.̑ ̭᷿̎̅(ͫP̏ḻ̤͐e᷿͉͑̃̐͑͝a̘s̴eͩ.̪͑ͨ̄᷾̚͠)
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MERCY is a powerful force.
Even the mightiest beasts bow before it.
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Summary
Mercury just wants life to go back to what it was a month ago. Working at a job he absolutely loves, going to the bar with his friends, and enjoying the home hes worked so hard to build.
But what do you do when home doesn't really feel like...home anymore?
Why you get a dozen new skeleton roommates, that's what!
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Bookmark Notes:
Ch2
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🍰Age/Pet-Regression Fics🎠 by The_Lunar_Occult_Agere (The_Lunar_Occult_Wrote), The_Lunar_Occult_Wrote
Fandom: Call of Duty (Video Games), Iron Man (Movies), Marvel Cinematic Universe, Murder Drones (Web Series), Rise of the Teenage Mutant Ninja Turtles (Cartoon 2018), Samurai Rabbit: The Usagi Chronicles (Cartoon), Sonic the Hedgehog (Live Action Universe), Spider-Man (Tom Holland Movies), Spider-Man - All Media Types, Teenage Mutant Ninja Turtles (TV 2012), Teenage Mutant Ninja Turtles - All Media Types, The Amazing Digital Circus (Web Series), The Owl House (Cartoon), Transformers: Prime, Transformers: Rescue Bots Academy (Cartoon), Undertale (Video Game)
22 Apr 2025
- Words:
- 101,224
- Works:
- 21
- Bookmarks:
- 15
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Summary
You don't need help, you don't want help. You're sick of life, and you're trying to off yourself. Sucks that some real monsters are gonna do their damnedest to change your mind. Heavy trigger warning, for future use.
*EDIT*
You also end up destroying a couple thousand AU's as well.Series
- Part 1 of The Lost
- Language:
- English
- Words:
- 141,991
- Chapters:
- 25/25
- Comments:
- 265
- Kudos:
- 892
- Bookmarks:
- 144
- Hits:
- 21,437