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1. The Royal Holy Oath by PepperBurst

   Fandoms: Hazbin Hotel (Cartoon)  

   • Mature
   • Graphic Depictions Of Violence, Major Character Death
   • Multi
   • Work in Progress

   06 Nov 2025

   Tags

   • Graphic Depictions Of Violence
   • Major Character Death
   • Alastor/Lucifer Magne | Morningstar
   • Lilith Magne | Morningstar/Lucifer Magne | Morningstar
   • Charlie Magne | Morningstar/Vaggie
   • Alastor & Alastor's Mother (Hazbin Hotel)
   • Alastor (Hazbin Hotel)
   • Lucifer Magne | Morningstar
   • Charlie Magne | Morningstar
   • Alastor's Mother (Hazbin Hotel)
   • Asmodeus | Ozzie (Helluva Boss)
   • Husk (Hazbin Hotel)
   • Niffty (Hazbin Hotel)
   • Mimzy (Hazbin Hotel)
   • Original Hazbin Hotel Character(s)
   • Time Travel
   • Fluid Sexuality
   • Non Sex-Repulsed Alastor (Hazbin Hotel)
   • Enemies to Friends to Lovers
   • Separations
   • Gender Fluid Lucifer
   • Lucifer Magne | Morningstar is Bad at Feelings
   • Alastor is Bad at Feelings (Hazbin Hotel)
   • Alastor is in Hell for a Reason (Hazbin Hotel)
   • Journey of Self-Understanding
   • Lilith is a bad wife
   • Lucifer and Lilith divorced for a reason
   • no beta-reader
   • Major - Freeform

   Summary

   Lucifer never thought he would get to use it. A vow so powerful it could rival that of God himself. He thought himself broken, forgotten and alone. Until he gave his oath to the one person, he never thought could deserve it, the man he hated from the moment they met.

   This is Lucifer’s journey to save Alastor from his own death and give him the life he deserved. One paved with love, sacrifice, and separation.

   Language:

   English

   Words:

   29,985

   Chapters:

   8/?

   Comments:

   32

   Kudos:

   245

   Bookmarks:

   69

   Hits:

   4,812