User blog comment:Miskos3/Fairy Tail Chapter 379: Tartarus Arc, Part 3: Underworld King, Review/@comment-49.184.77.110-20140404075445/@comment-2214433-20140404080313

Well, first of all, the time of activation has already passed and that's why both Kyouka and Franmalth panicked. So, unless it magically activates itself later, I don't see it happening. And "Fairy Tail is somehow immune to it" would have to be supported by a really good explanation, otherwise it'd be the lamest thing ever.