Fairy Tail 15 by Hiro Mashima
Laxus' group is decimated but he still refuses to listen to reason and the 'Palace of the divine songs' still threatens the city. The intervention of Mistgun changes nothing, not even the announcement of the health of his grandfather, Master Makarov. Laxus is determined to get his hands on the Fairy Tail guild to accomplish his plan. Fortunately, Natsu is ready to prove he is the strongest, although he must coexist with Gajeel to do so.