User blog comment:IamJakuhoRaikoben/Chapter 383: Surfer Lucy, Review./@comment-24748439-20140510013721/@comment-7418318-20140511075015

I did get the reference, hence why I wrote the comment about the CSW being the worst possible way for training. And also for recovering and healing.

I also did consider the time-difference. The few minutes comment was just me trying to keep the comment short (and not having to calculate anything through). I did mean instant travel, if that's possible. And if it's not, for one reason or the other, I meant it to last as short as possible. Preferably in the area of seconds rather than minutes.

As for the timing: 5 min * 90 = 450 min = 18.75 days.

The 7.5 hours you calculated were actually 5 seconds in the Spirit World... which is worse than I imagined before calculating it through.

Maybe one of the Spirits she doesn't have summoned yet could contact Yukino through Pisces before Lucy is spirited away, so she can instantly go to Sabertooth without losing any time.

@KnockKnocking: Nice idea about Minerva wanting to defeat Lucy to gain enough favour to have Erza set free for the final showdown. I didn't think of that.

While your theory would make a lot of sense, there's still room for doubt. There is one unknown about Minerva currently. We don't know how much her personality changed by being turned into a Demon. The old Minerva would surely have acted like you said, but she was quite enraged when Erza was pulled in. It's possible that she doesn't have herself under control as well as she used to.

I think that your version is the more likely one, but I'm wouldn't be confident enough to put any money on it.