The Entire Chilling Adventures Of Sabrina Timeline Explained

The Cosmic is the first Eldritch Horror not to manifest in Greendale itself. Instead, it begins to condense the realms — Hell, Earth, and Heaven — until they bleed together, which will ultimately lead to mass chaos. An angel, Metatron, arrives in Greendale when this begins to happen and tells the coven that it's occurring because there are two Sabrinas. The continued existence of both Spellman and Morningstar has created a parallel cosmos, which is being pulled toward Earth. To stop the inevitable collision and The Cosmic, one of the Sabrinas must be sent to an alternate Earth.

Spellman and Morningstar both have lives here on Earth, so they decide that the fairest way to determine who stays and who goes is to play "Rock, Paper, Scissors." Morningstar loses, so she's sent away. On the alternate Earth, she's an actor playing herself in a sitcom version of her life, surrounded by her family and friends who are also playing versions of themselves in the TV show. However, it isn't quite that simple: The Endless, in the form of an animatronic Salem, has turned this realm into a never-ending sitcom for its own amusement. Like the other Eldritch Terrors, The Endless is working for The Void. When Morningstar realizes this, she returns to the main Earth to warn Spellman, then dies seemingly from a combination of injuries and the trip through realms.