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Deep within the belly of the Omega Timeline rests the Underground.
Not to be mistaken with the Underground— the forced sanctuary settled beneath mountain top: The setting for a story told many a time. No. Deep within the churning, hollow soul of the Omega Timeline rests the True Underground.
And, nestled deep within the pit of this chasm, rests a fight club.
Palette knows it as his second home.
Or: Hidden deep within the Omega Timeline, there exists a fight club and black market. Years ago, a sick doctor created life from little more than abandoned magic. Gradient escapes. Palette waits. Dream is faced with echoes of his past. Ink claws for his identity. And, Nightmare steps into the light once more.
Series
- Part 10 of Multiverse of Grey
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Dream and Nightmare have a peaceful life in the haven they call home, but what happens when. Nightmare meets someone new?
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Red wakes up in an AU that's not his own. After being taken in by Sans, his adventure begins. Drama, violence, silly insults, actual serious moments, romance, and more!
I don't know what tags to use, so tag suggestions are welcome! -
when that concept blossoms, it falls, like ripened fruit by starry_window
Fandoms: Undertale (Video Game)
16 Feb 2026
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Killer, attempting to do something nice for what is potentially the first time in his life, falls off a chair and cracks his skull open. Luckily (or maybe unluckily), he's got two people who are Very Gay for and Very Worried about him.
Series
- Part 2 of gardening & its repercussions
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After the events of The Yearly Ball things have not gotten much better for anyone. Script now has LOVE and is still trapped inside of her head. The gang and allies are working hard to try and bring her home, but will she be the same after all the years have passed? Will Sol finally face the hangmen so to speak? Is Script ever going to find a chance to actually be? So much is left in the dark ....
Edited 12/31/2025 to reflect change in title and storyline development
Series
- Part 1 of Out In The Multiverse
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Request Open // Where we lose ourselves by Lucia_Oleander
Fandoms: Undertale (Video Game)
16 Feb 2026
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Commission open! Sanses Only!!
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Day 12: Sent Home From Work. by Xime444
Fandoms: Undertale (Video Game), Multiverse (Undertale) - Fandom
15 Feb 2026
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Sugar knows the signs—he always does.
Melon slowly recovers—only to prove once again that stubborn habits are hard to break.
Sometimes love means caring anyway. Even when you definitely warned them.
Series
- Part 12 of Feveruary2026
- Language:
- English
- Words:
- 367
- Chapters:
- 1/1
- Collections:
- 1
- Hits:
- 11
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With everything they have been together for the last few weeks, Nightmare agrees to let Luna and Honey go out to get supplies for the growing number of residents within the Castle.
Who could have known the dimension the deity sends them to is one that will have past lives clashing and major secrets finally revealed.
Series
- Part 5 of Kaleidoscope
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On the ice, Cross knows exactly who he is.
Hockey is noise and impact and certainty—early mornings, aching muscles, and the comfort of rules that never change. The rink has always made sense to him. Until one quiet practice, when his focus drifts to the far end of the ice… and to Dream.
Dream skates like the world is holding its breath for him. Alone, graceful, and seemingly untouched by the chaos around him, he moves with a softness Cross has never learned how to name. They share the same rink, the same cold air, but live in completely different worlds—one built on force, the other on trust.
As practices overlap and glances linger, Cross begins to notice the spaces between collisions, the silence beneath the noise. And Dream, used to skating alone, starts to wonder what it would feel like to be seen.
Set beneath bright rink lights and winter mornings, this is a story about two boys moving in opposite directions, until the ice pulls them closer. About finding connection in quiet moments. About learning that sometimes, the most powerful thing isn’t how hard you hit the ice… but how gently you glide across it.
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A story of a young Ink discovering what it means to be a Protector of Creation, as he finds his place in the Multiverse.
Series
- Part 1 of Reflections in the Mirror
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“Hey, uh, hey, boss. What’s up?”
Killer stood, alone, in the empty hall that made up Nightmare’s throne room. Horror and Dust, as useful as they’d always been to him, he hadn’t summoned. Nightmare would need to, sometime, but this… he had reasoned to himself that this, perhaps, was something done better with just the two of them, face to face. More personal. So Killer stood in the grand hall, hands shoved into the pockets of his jacket, his near-perpetual smile unfailing.
And completely, entirely, utterly at Nightmare’s mercy.
Nightmare reflects. Then he does something about it; something he once never would have.
He lets them go.
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A magical girl is summoned to help the Star Sanses stop losing their battles and get back on their feet. They didn't ask for her help, but higher powers decided they needed it
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"Somos desconocidos tú y yo,
¿qué nos hace diferentes de lo que alguna vez fuimos y nunca seremos?,
ya no somos los mismos, es un hecho,
¿entonces por qué el dolor sigue siendo el mismo?"★ ★ ★
Error ha pasado su vida tratando de olvidar a Ink, con quién alguna vez creyó tenerlo todo.
Ahora, casi a sus 30 años, está listo para cumplir una promesa con la que finalmente dejará atrás el pasado. Pero, el destino tiene otros planes y un reencuentro inesperado podría avivarlo o destruirlo todo.
No todo es lo que parece y un secreto guardado durante años podría reescribir su historia.
¿Podrá el amor que una vez los unió sanar las viejas heridas?
¿O seguirán pretendiendo ser desconocidos?
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Bound by night, Born of light by GeckoWings545
Fandoms: Undertale (Video Game), Undertale AU - Fandom
15 Feb 2026
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If you blacked out for a week or two after taking a projectile to the head, you'd probably be confused. Fair enough.
But come on—this? This is just excessive.
Waking up in the middle of an unfamiliar room, head pounding like it’s trying to cave in on itself, would rattle anyone. But it’s not just the room that’s unfamiliar.
Everything is.
No memories. No clues. Nothing.
Except… one thing.
your name.
Y/N. Y/N L/N.
And right now, that name is your only lifeline—something to cling to while you flounder through the wreckage of a life you no longer remember.
Now if only you could recall this elusive husband everyone supposedly insists you have....
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A completely normal human getting Reincarnated as a certain Skeleton's body! A story about hope! And definitely not set on crushing yours.
Oh! And somehow everyone thinks he and Error are a couple...Huh weird right?
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Undertale / UTMV sanscest hypnosis oneshots by Chris_ghosty77
Fandoms: Undertale (Video Game)
15 Feb 2026
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My first work, a book of oneshots focused on hypnosis / mind control.
Most stories will be non/dub-con so be careful.
Almost any ships, focused on sanscest.
Edit: The number of tags being limited, please read the summary of each chapter to know the warnings / kinks. I hope you enjoy reading this book as much as I love writing it.Series
- Part 1 of Undertail hypnosis series
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Art from: VolodyaNocturneНайтмер победил. Тень Короля Кошмаров накрыла миры, а единственный, кто мог ей противостоять, стал его личным трофеем. Дрим забыл вкус свободы и тяжесть своего лука, теперь он лишь узник в стенах собственного дома.
В неприступной Омеге догорает последний очаг сопротивления. Надежда беженцев о свободе становится все слабее, но они продолжают бороться, ведь иногда даже реквием по мечте можно спеть с оружием в руках.
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IM BACK IN THE BUILDING AGAIN! (Aka, Undertale multiverse is dragging me back to the deepest pits)
There was once a plain world, and one entity decided to bring forth gods to protect and rule the future they foresaw. So they planned, they waited. Then a spark happened
One lonely world, along a vast plane, existed. One star bright among the black canvas. They watched over it, curious about the world that one mysterious deity had created out of loneliness.They watched it branch, alternate universes connecting to one. Only when it reached a certain number did they start to create their own.
The first one is the advocator, given the ability to aid in creating with a swipe of their brush.
The second one is the enforcer, given the ability to erase or decode malfunctioning or barren AUs that would risk their universe collapsing- Language:
- English
- Words:
- 711
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 19
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Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
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I'm mentally torturing my own version of Nightmare and He is hating life. Also multverse war is going on i don't know this is chaos read it i promies it's good!