This article contains spoilers for Doctor Strange in the Multiverse of Magic.
Doctor Strange in the Multiverse of Madness destroyed both the Darkhold and the Book of Vishanti, changing magic in the MCU forever. The MCU has tied its version of magic to the multiverse from the beginning, with the Ancient One telling Doctor Strange sorcerers draw power from other universes and use it to shape reality itself. It was, therefore, always inevitable that Stephen Strange would be the first MCU superhero to plunge into a multiverse of madness.
There is a sense in which Doctor Strange 2 was a story of two books — specifically, two books of magic. Scarlet Witch had come into possession of the Darkhold, a forbidden book of dark magic apparently created by the first demon, Chthon. Doctor Strange believed another book of magic could be used to counter the Darkhold, the Book of Vishanti, which he pursued into the multiverse — only for it to be destroyed before his eyes. Strange was left no choice but to use another version of the Darkhold itself against Scarlet Witch, drawing on the blackest of magics and risking his soul to save the multiverse.
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Both the Darkhold and the Book of Vishanti are lifted straight from the comics, but in the MCU both now appear to be gone. This will undoubtedly have a profound effect on the MCU's multiverse, as Doctor Strange attempts to deal with the repercussions of this crisis. It may even set up an even greater crisis than Scarlet Witch's multiversal rampage.
In the comics, the Darkhold was created by Chthon, one of the Elder Gods who ruled Earth in prehistoric times. Although some of these Elder Gods were good, others
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