FAIRY TAIL Vol 8

From the Kodansha edition

ULTIMATE DUEL Gajeel is a dragon slayer who can shoot huge iron pillars from his body with crushing precision, while dragon slayer Natsu fights with devastating flame attacks. Their fierce battle began when Gajeel's wizard guild, Phantom Lord, assauted rival guild Fairy Tail - but can either headquarters withstand two such destructive forces? Includes special extras after the story!

Source: Penguin Random House API