User blog comment:IamJakuhoRaikoben/Chapter 373: Life or Death?, Review./@comment-4718355-20140301153731/@comment-7418318-20140301161446

Okay, let me go through your post bit by bit:


 * I doubt there is a flip off switch: That was just an overdrawn example, as you can see from what I wrote in my 2nd sentence.
 * tartarous is too smart for that: We don't know if they were the ones who originally build it. Besides the Tartarus members havn't shown themselves to be exceptionally smart so far, so I don't see where you take your confidence in their intelligence from.
 * Even if there was they would destroy it so it would go off no matter what.: Destroying the interface could just as well backfire and deactivate the bomb for good. Just doing such a rash act would be quite the gamble.
 * I doubt they could deactivate it once it starts: Why? We know next to nothing about face, so how can you be so sure?
 *  the magic council is pretty serious when it comes to magic weapons.: The ease with which Eisenwald could get their hands on Lullaby, that the council never placed any guards at Nirvana's location (Jellal knew that from his days on the council, so the rest of the council probably knew too, or would at least have been able to find out, if they put their minds to it) or tried to find Face's locations to guard it, despite being aware of it's existance, makes me believe otherwise. As far as we know they just slapped the seal on it (or maybe kept maintaining the seal, after taking over that duty from the original creators) and left everything else to fate.