The Darkhold, also known as The Book of Sins, is a fictional book appearing in American comic books published by Marvel Comics. It is a grimoire and collection of iron-bound scrolls containing the collected magical knowledge of the Elder God-turned demon Chthon, the first practitioner of dark magics.
The Darkhold has appeared in the Marvel Cinematic Universe television series Agents of S.H.I.E.L.D. (season 4; 2016 - 2017), Runaways (season 3; 2019), WandaVision (2021), and the 2022 movie Doctor Strange in the Multiverse of Madness. It first appeared in the Werewolf by Night story in Marvel Spotlight #4.