Felldust

*For other versions of Underfell, see Underfell (disambiguation).*

Created by BreadMixer

**FellDust** is an AU merging Dusttale and Underfell. This version is not entirely a combination of those two AUs, but rather a reconceptualization of Underfell, in which the story is set up in a way that will force it to play out as though it were a Dusttale AU. The difference between Dusttale and Felldust is that Frisk is the one forced to recreate a genocide route in order to stop Sans. It functions as a dynamic change within a custom take of Underfell.

It is ultimately a complete dynamic shift of the original Dusttale, by Evan Streblow and Osteophile. Some of Underfell's canonical components shine in this AU, as well, as it takes much inspiration from Underfella's work, but it is designed to be original from both AUs.

This is NOT a ship AU, but there is a component of love within some of the characters. Frisk is depicted as 18+ in this AU, though their gender is not set.

Similarly to how Dusttale's Sans remembered the countless genocide routes performed by the human, FellDust's Sans remembered the pacifist routes performed by his. This forced the skeleton into a state of partial shock, followed by aggression toward any monster that tried to harm the human. After numerous RESETs, Sans began executing monsters in the underground, much to Frisk's disliking. Over time, Frisk was forced to kill monsters to stop Sans from doing the same, ending in Sans finding a method of permanently executing Frisk, which leaves him in an empty underground with the pain of knowing he killed the only person that still meant anything to him.

## Characters

### Undertale Characters

#### Sans

*The information provided on Sans in this AU is limited to this specific take on Felldust. Any information that doesn't align with anything shown in this article may very well be a different take.*

This take of Underfell's Sans involves a more bitter and irritable take of his personality. He will no longer actively communicate with Frisk, and instead will go out of his way to avoid them, until later parts of the story.

After remembering the pacifist routes, Sans becomes violent and aggressive toward all monsters, and becomes more defensive of Frisk, even going as far as physically lunging in front of them at his own expense. His mental state gradually deteriorates after usage of the DT injections, as they impact his perception and physical condition permanently. Sans experiences forms of hallucinations and frequent panic attacks, as well as the occasional non-metaphorical *melt*down. The reasons for the injections is/will be covered in the story.

Thanks to the Determination injections, he receives bonus perks such as the ability to keep memories and skills beyond resets. His physical form will always reset, and he will always begin deteriorating as a result of the DT. One of the aforementioned skills are Shell Blasters. Using Memoryheads in combination with ordinary blasters, an infected form of them called Shell Blasters formed out of pure chance. The blasters are unable to fire beams of energy, unlike their regular counterpart, and instead rely on discharge of sound and tampering with their target's memories, which is the only reason Sans is capable of fulfilling a No-Mercy route by himself.

#### Papyrus

Brother of Sans. He is the main inspiration for Sans's decision to calmly go postal. Papyrus frequently underestimates and belittles Sans in order to inspire him to try harder, which he never does. The constant insulting and failure of Papyrus's expectations aided in Sans's justification for committing mass stabby-stab.

Papyrus is a member of the Royal Guard, and is one of the higher-ranking ones. He is able to gather information and shares much of it with his brother.

#### Frisk

Maintains the kind and caring personality seen by most renditions of Underfell Frisk, however this version is older. Frisk in this AU is nonbinary, and is over 18. They are allies with Asriel and actively try to discourage Sans from killing. They actively avoid causing monsters harm, and attempt to save any that they can.

After Sans's repeated genocide routes, they were forced to become more aggressive and defensive in order to survive, which ultimately leads to one of two Dusttale-inspired endings.

Frisk grew up in Ebott city, facing poverty and unfair treatment by practically everyone there. One day, they chose to run off toward Mt. Ebott, and unsurprisingly to every AU here, fell in.

#### Asriel

Not too long before Frisk fell down, Asgore commanded the Royal Scientist to configure a form for Asriel after discovering his revival as a flower - one similar to Mettaton's - only for the former prince to run away to the Catacombs with the new form. He lives with Toriel, and is the first ally of Frisk. There isn't much more to him than that.

## Locations

### Undertale Locations

#### Catacombs (Ruins)

After years of being mistreated, the structure and iconic stone artwork of the Ruins was vandalized and demolished. It maintains a dull, grey color with flickering and dysfunctional electric bulbs built into the ceiling of nearly every room. In spite of the clouds of dust creeping their way throughout the rooms, occasionally revealing the presence of some odd monster, the Catacombs are bursting with activity. The nearly overpopulated tunnels and areas are coated in boulders and rocks, with miniature villages and towns scattered about.

#### Snowdin

After an extreme malfunction occured in the CORE, Snowdin's upper level was completely submerged in snow, sent into a never-ending blizzard. The inhabitants of Snowdin were sent into a new location, which the King brilliantly named "Inner Snowdin." This area is far smaller, and is entirely submerged, with little to no natural light.

In the story, conflict arises once the Royal Guard decides to begin kicking monsters out of Inner Snowdin, which would almost certainly kill them.

##### Inner Snowdin

All of the typical characters from Undertale can be found in Inner Snowdin. None of them will behave the same way, however, as most, such as Dogamy and Dogaressa, have been adapted to be either more aggressive, connected with different people, or revamped entirely.

Grillby's is far more prestigeous, and is not a hang-out place to Sans. The tavern will only let in Royal Guards and members who have bought their way in.

##### Outer Snowdin

As stated, Outer Snowdin is almost completely enveloped in snow. Even the trees are no longer visible; most have been coated in frost. Monsters will still show up occasionally in the area, but the only ones that do are adapted to survive in frigid temperatures. Frisk cannot survive in Outer Snowdin, and will collapse after only a few minutes in the area, which typically prompts Sans finding them.

#### Waterfall

Instead of being clean and aesthetically pleasing, Waterfall in the underground of this world smells absolutely disgusting. The water is turbid and dark green, almost completely covered in garbage, as well as a few weapons. In a single room of Waterfall, specifically the one accessed by playing specific notes on the piano, clean water can be found in a small pond. When returned to later on, it becomes the same disgusting green color as the rest of Waterfall, demolishing whatever small glimpse of hope the region had for being beautiful again.

#### Hotland

Due to the CORE malfunctioning, Hotland's temperatures skyrocketed, forcing nearly all inhabitants to seek shelter. Most regions explored in Hotland must be indoors, as the outside is far too hot for anyone to survive.

## Story

* Written
* Soundtrack

* Introduction
* Chapter 1
* Chapter 2
* Chapter 3

* Once Upon A Time
* Walk (Intro)
* EFOSNFAFIWYBAG (Napstablook)
* Her Theme
* Order (Battle)
* Snowed Out (Snowy)
* it's me. (Sans)
* Reporting For Duty (Nyeh Heh Heh!)
* Waterfell
* Temmie Village
* No Regrets (Megalovania)
* Asgore
* gatser (Gaster's Theme)

## Gallery

Created by KimchiConcept art for Shell Blasters - Created by Temmie Chang, modified by Bread-deal
## Trivia

* Papyrus does *not* have a phantom form, and never shows up alongside Sans in battle. Reason being that Sans's hallucinations appear only to himself, and are not manifested in any form of magic; also, Papyrus doesn't turn into a ghost.
* Sans doesn't have five million HP in this AU. He's still 1 hit from death, but his HP does extend slightly past its base with the LV he gains.
* The name for this version of Sans varies, though in rough terminology, he can be referred to as "shell," due to his usage of the Shell Blasters. Furthermore, being a "shell" can mean that a person is emotionally hollow and/or is damaged inside. This one is heavily up for debate, of course.
* Sans is able to remember RESETs, but only in vivid detail, through the usage of his DT injections. This was after he remembered all pacifist routes taken by Frisk in a random dream.
* Sans does not wear his hood up, typically, due to him not feeling the need to hide himself away. The genocide routes performed by him were out of his desire to be recognized and feared, ergo hiding wouldn't make sense with his motives.