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In 2018, Rowena began killing people and their [[reapers]] to get [[Death]]'s attention, as she blamed herself for Crowley's death and the path that her abandonment led him down in life. During this, the reaper [[Jessica]] reveals that in the book [[Death]] keeps on her, it is written that she will die by the hands of Sam Winchester. While [[Billie]] refused to bring Crowley back, the experience ended with Rowena deciding that working for the greater good will serve as her [[redemption]] for her past actions. She subsequently aided the Winchesters in their efforts to return to [[Apocalypse World]] and on occasions when they needed her expertise on a situation or case.
In 2019, after the release of the [[Hell Ghosts]] upon the world, Rowena chose to sacrifice herself to save the world by using her own body to imprison all of the souls and demons and cast them back into Hell. At Rowena's request, and with great reluctance, Sam was indeed the one who fatally stabbed Rowena.
Following Rowena's death, Sam inherited [[Rowena's Spellbooks|her magical stash]], which she intended since Sam was described by Dean as "Rowena's protégé. "
When the Winchesters and Castiel return to Hell in search of [[Michael]], they discover that Rowena's [[soul]] took up the empty position of Queen of Hell. Retaining her old personality, Rowena aids the Winchesters once again and even urges Dean and Castiel to mend their broken relationship.
In 2019, Rowena sacrificed herself to banish the [[Hell ghosts]] back where they came from, having [[Sam]] fulfill [[Death]]'s prophecy that he will kill her in order to save the world. She subsequently became the Queen of Hell.