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While Chilling Adventures of Sabrina Season 4 ended with Sabrina entering the Happy Hereafter with her boyfriend, Nick Scratch (Gavin Leatherwood), the upcoming comic book spin-off The Occult World of Sabrina will detail her resurrection. With no other options left, Sabrina Spellman sacrificed herself to stop the Eldritch Terrors from destroying her native universe, which resulted in her own death.
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This led to the destruction of the parallel universe, which also resulted the death of Morningstar.
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While the removal of one Sabrina should've corrected the paradox, the threat of the Eldritch Terrors persisted. The two Sabrinas went with the latter decision, with Morningstar finding herself in the universe of the 1996 Sabrina, the Teenage Witch sitcom. This split created the paradox that led to the Eldritch Terrors, and this forced the two Sabrinas to make a choice: either merge back into one person or send one Sabrina to a parallel universe to correct the paradox. With all the craziness Sabrina endured in her own show, she eventually split herself into two people: Sabrina Morningstar, who embraced her place as the Dark Lord's daughter in hell, and her normal self as Sabrina Spellman. After too many betrayals and transgressions, Blackwood was eventually ousted by his own coven, with Sabrina's aunt Zelda becoming the new high priestess and repurposing the coven as the Order of Hecate. In the main Riverdale universe, Sabrina's family was part of a Satanic coven known as the Church of Night with Faustus Blackwood (Richard Coyle) as the high priest. Despite some of the major differences between the Riverdale and Rivervale timelines, it's strongly implied the events of Chilling Adventures of Sabrina Season 4 still transpired in roughly the same way.
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