Where the anime ends, and where the books carry onAnime, manga, light novels and web novels, lined up by story arc

Arc Almanac

21 Oct 2026Draft. Not yet checked against the books.

All series / A Certain Magical Index / Arc 19

Arc 19 of 66 in A Certain Magical Index

Arc 19: Necromancer

In the story: Sep

Arc name chosen by Arc Almanac, because the books don’t name it.

I’ve watched through

Index I stops before this arc.

Railgun stops before this arc.

Earlier in story order than the end of Index II.

Earlier in story order than the end of The Miracle of Endymion.

Railgun S stops before this arc.

Earlier in story order than the end of Index III.

Seen by the end of Accelerator.

Earlier in story order than the end of Railgun T.

Item (episodes 1–2; airing) stops before this arc.

What happens

Accelerator encounters Esther while a rogue faction of Anti-Skill pursues its own version of justice. Necromancy and stolen research draw him into a conflict that also threatens Last Order and the other people around him.

Where it sits

Necromancer in A Certain Magical Index
FormatVolumesUnitsLanguage
Manga — A Certain Scientific AcceleratorVol 1, 2, 3, 4, 5, 6, 7Chapters 1–36Japanese
Manga — A Certain Scientific AcceleratorVol 1, 2, 3, 4, 5, 6, 7Chapters 1–36English
Anime — A Certain Scientific AcceleratorAcceleratorSeason 1, episodes 2–12—

Draft. Not yet checked against the books. Report a wrong mapping.