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Crowley is a demon and the current King of Hell. He is formerly the King of the Crossroads and right-hand man of the first demon and then-de facto ruler of Hell, Lilith. He usurped leadership of Hell after he assisted in the re-imprisonment of the fallen archangelLucifer in his Cage, who had been recently released after the final seal, killing the first demon, had been broken. He was double-crossed in his attempt to partner with the angel Castiel to access and claim the souls of Purgatory to increase his power. He also lent his blood to kill the leader of the Leviathans, Dick Roman and attempted to translate the angel and demon tablets to further his own agenda, including potentially permanently opening the Gates of Hell.Crowley was captured by the Winchesters as part of a final trial to close the Gates of Hell, and despite this trial not being completed, remained imprisoned in the Bunker for a time with a coup underway for Hell's leadership. After helping Sam expel Gadreel, Crowley was at war with Abaddon for rule of Hell. However the addiction to human blood that he developed during the final trial distracts him from the task. He forms a reluctant alliance with Dean to find the First Blade, the only thing that can kill Abaddon. After helping Sam and Dean retrieve the blade, he steals it to prevent them killing him. After his son is brought into the present to be used as leverage against him, Crowley lures the Winchesters into a trap for Abaddon, simultaneously warning them about it. Dean kills Abaddon, restoring Crowley to full control of Hell and the Winchesters spare his life. After Dean's death at Metatron's hands, Crowley becomes determined to help him embrace his new life as a demon.