User blog comment:Miskos3/Fairy Tail Chapter 379: Tartarus Arc, Part 3: Underworld King, Review/@comment-4449950-20140404073720/@comment-119.95.182.186-20140405054315

Lol. I was referring to Lucy and Wendy's Unison Raid. Scorpio's sand and Wendy's Roar. It happened in the fight against Hades.