User blog comment:Miskos3/Fairy Tail Episode 249: Tartaros arc: The Celestial King vs. The Underworld King, Review/@comment-4933386-20150905142246/@comment-4933386-20150906043326

The explosives was useless cause Lucy was casting it at that time. I'm not sure if the Water Barrier will be activated if Jackal attacked while Lucy was casting Urano Metria.