User blog comment:Twilight Despair 5/Abaddon as the Season 9 Big Bad?/@comment-82.34.210.166-20130417043649/@comment-3481504-20130417183337

No, no, no. You, apparently, don't understand the context of this.

No, because Kevin, in one of the episodes, uses the word, "shut." That means, once the spelll is anunciated, every kind of demon, will be forever trapped in Hell.