FAIRY TAIL Vol 13

From the Kodansha edition

THE DOOMSDAY WEAPON! Master Makarov’s grandson, the too-powerful wizard Laxus, has seen the new Fairy Tail guild hall and doesn’t like what he sees! So he gathers some of the strongest wizards in the guild, and starts a Fairy Tail civil war! Includes special extras after the story!

Source: Penguin Random House API