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1. Beasts of Abaddon by EchoFlowerWhispers (100_Crickets)

   Fandoms: Undertale (Video Game)  

   • Mature
   • Graphic Depictions Of Violence
   • M/M
   • Work in Progress

   05 Jan 2026

   Tags

   • Graphic Depictions Of Violence
   • Sans/Sans (Undertale)
   • Dreamtale Nightmare Sans (Undertale)
   • Something New Sans | Killer (Undertale)
   • Dusttale Sans (Undertale)
   • Xtale Sans | Cross (Undertale)
   • Horrortale Sans (Undertale)
   • Alternate Universe - Human
   • Alternate Universe - Fantasy
   • Starvation
   • Shapeshifting
   • in a way? - Freeform
   • Dust is a jackalope
   • Horror is a chimera
   • Cross is a Human
   • Killer is a tatzelwurm
   • Blood and Injury
   • Eventual Relationships
   • Eventual Romance
   • Past Abuse
   • Implied/Referenced Child Abuse
   • Implied/Referenced Domestic Violence
   • Fever Dreams
   • Animal Traits
   • Animal Instincts
   • Nightmare is a Peryton
   • Not Beta Read
   • BSP
   • Polyamorous Bad Sanses | Nightmare's Gang (Undertale)
   • bad sans poly - Freeform
   • POV Third Person
   • will add more tags

   Summary

   Cross was raised to believe everything outside his home town is dangerous and wild. In an effort to escape his father's abuse, he takes the risk and runs away, trying his best to find a new place to call home. Unbeknownst to him, he was about to find more than just a home, and through gnashing teeth and sharp claws, Cross feels oddly at peace.

   or

   I like putting Cross in situations and turning everyone into strange little creatures, sue me

   Language:

   English

   Words:

   1,330

   Chapters:

   1/?

   Comments:

   7

   Kudos:

   40

   Bookmarks:

   6

   Hits:

   310