To save Lucy, Natsu fights against Gajeel, whose Dragon Slayer magic allows the two to fight on even grounds until Gajeel gains the upper hand by eating iron to regain his energy, leaving Natsu weak without any fire to eat. Lucy helps Natsu by summoning Sagittarius, the only celestial spirit currently in her possession, who is able to start a fire by shooting an arrow at a set of machinery, causing an explosion that allows Natsu to feed and continue fighting.