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• Mandatory Harry Potter AU by destroyerofvoidsss

  Fandoms: Undertale (Video Game), Harry Potter - J. K. Rowling  

  • General Audiences
  • No Archive Warnings Apply
  • Multi
  • Work in Progress

  03 Jun 2026

  Tags

  • No Archive Warnings Apply
  • Sans/Sans (Undertale)
  • Sans (Undertale)
  • Sans Ensemble (Undertale)
  • Gradient (Undertale - AskComboClub)
  • Palette Roller (Undertale - Lasserbatsu)
  • Goth (Undertale - Nekophy)
  • Crescent (Undertale - Lunnar-Chan)
  • Angst (Undertale - naomiisenju)
  • Lux (Undertale - Previously Jakei95 / AlainaPrana)
  • PaperJam (Undertale - 7goodangel)
  • Raven (Undertale - echoiarts / echoire)
  • Shino-Hana (Undertale - blue-kohina)
  • Hope (Undertale - julia-jck)
  • Vignette (Undertale - Karameru01)
  • Starcross (Undertale - Lunnar-Chan)
  • Starway (Undertale - Lunnar-Chan)
  • Cray (Undertale - Weezy-pup)
  • Deneb (Undertale - pepper-mint)
  • Yiang (Undertale - pepper-mint)
  • Cassis (Undertale - by Pepper-Mint)
  • Crypto (Undertale - Karameru01)
  • Error Sans (Undertale)
  • _____tale Sans | Ink (Undertale)
  • Dreamtale Nightmare Sans (Undertale)
  • Passive Dreamtale Nightmare Sans (Undertale)
  • Passive and NM aren't the same person just a headsup
  • Dreamtale Sans | Dream (Undertale)
  • Science Sans (Undertale) - Freeform
  • Shattered Dreamtale Sans (Undertale)
  • Shattered and Dream aren't the same person either
  • Alternate Universe - Undertale Multiverse | UTMV (Undertale)
  • Alternate Universe - Hogwarts
  • Alternate Universe - Human
  • Alternate Universe - Canon Divergence
  • Alternate Universe - No Powers
  • actually just a lilbitt....
  • Alternate Universe - Magic
  • im SO sorry for making this author regrets everything especially the tags im yet to add
  • Palette Roller/Goth - Freeform
  • Paperjam/Lux
  • aaand additional ships to be added no spoilers
  • i js had to add the obvious yk...
  • Eventual Relationships
  • Error Sans/_____tale Sans | Ink (Undertale)
  • Dreamtale Sans | Dream/_____tale Sans | Ink (Undertale)
  • Underswap Sans (Undertale)
  • divorced Errorink
  • poth
  • paperlux
  • had to add them ok. ok
  • Other Additional Tags to Be Added
  • I'm Sorry
  • English Is Not The Author's First Language
  • inspired by a rewrite of BlogTheGreatRouge's NAJ
  • My rewrite
  • Author is the target audience
  • More tags are coming and that's a warning AND a threat
  • Song: Willow Tree (Rival/Cadmium/Rosendale)
  • Book 5: Harry Potter and the Order of the Phoenix
  • Unreliable Narrator
  • Author can't write and is aware their writing is on par with Wattpad's usual
  • Author is not a J.K.Rowling apologist
  • Combo Club mentioned

  Summary

  " Nearly four years ago, if someone told him he'd be going to a school of magic, Gradient was sure he'd laugh in their face. He wasn't the social type, but he'd do it anyway, because it was just ridicolous enough, just insane enough, just fantasy enough that not laughing would look weirder."

  OR

  Author's self indulgent Harry Potter x UTMV x Human AU crossover fic made for shits and giggles. Warning in advance for mediocre writing.

  Language:

  English

  Words:

  3,852

  Chapters:

  2/?

  Comments:

  2

  Kudos:

  1

  Hits:

  45