User blog comment:KillRoy231/How did you feel about O Brother Where Art Thou?/@comment-1031724-20151222194714/@comment-1031724-20160101221458

Abaddon had nearly as long a run as Metatron and was killed only a few episodes before the Season 9 finale. Together she and Metatron were main villains of Season 9: Abaddon with her plan to take over hell, and Metatron with his plan to take over heaven.