Fics like Imperium rising

Halloween is altered by a series of events which causes everything to change.

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1. Flesh is Weak by WelcomeToEstalia (Parahumans Series - Wildbow, Warhammer 40.000)
2. Ciaphas Cain: Hero of the Hedge by SaltySteel (A Song of Ice and Fire - George R. R. Martin, Warhammer 40.000, more)
3. Ciaphas Cain: Daemon of the Imperium by The_Plauge_Dragon (Warhammer 40.000, Warhammer 40k (Novels) - Various Authors)
4. Child of the Hellmouth by calikocat (Buffy the Vampire Slayer, YuYu Hakusho, more)
5. Ciaphas Cain: Hero of the Citadel by SaltySteel (Warhammer 40.000, Mass Effect - All Media Types)
6. Forging a Waifu Harem by Infonticus (Parahumans Series - Wildbow, Warhammer 40.000, more)
7. In This Place of Wrath and Tears by AprilFeldspar (Dune - All Media Types, Dune (2021), more)
8. The Saga of the Runt (Youjo Senki/WH30k) by l4oftheWEST (幼女戦記 | Youjo Senki | Saga of Tanya the Evil (Anime), 幼女戦記 | Youjo Senki | Saga of Tanya the Evil (Manga), more)
9. With Sprinkles by Narsil, dogbertcarroll (Buffy the Vampire Slayer (TV), Naruto (Anime & Manga), more)
10. An Extraordinary Journey by Fmfan1980 (Buffy the Vampire Slayer, Stargate SG-1, more)
11. Btvs Seasons Rewrite: Season 3 by DaniellaHarwood (Buffy the Vampire Slayer, The X-Files, more)
12. A Galaxy of Ghosts by 8uggestionAmplifie6 (Warhammer 40.000, Warhammer 40k (Novels) - Various Authors)
13. Otherwise by TheSigyn (Buffy the Vampire Slayer)
14. Through Seas of Stars by AidaHwedo (Critical Role (Web Series), Stargate SG-1)
15. Many Hands Make Light Work by Kellen795 (Warhammer 40.000, Halo (Video Games) & Related Fandoms)
16. Edge of Sorrow, Heart of Truth by feliciacraft (Buffy the Vampire Slayer)
17. Someday by sunalso (Buffy the Vampire Slayer)
18. Atlantis Rewritten by GreenSage2828 (Stargate SG-1, Stargate Atlantis)
19. Tomorrow, and Tomorrow, and Tomorrow by sunalso (Buffy the Vampire Slayer)
20. Butchered Tech by Bubbajack (Cyberpunk: Edgerunners (Anime), Parahumans Series - Wildbow, more)