Barthundara (バサンダラ, Basandara?), also known as Barthundra, is a recurring buffing spell in the series. The spell functions as an area of effect version of the Barthunder spell, raising the lightning-resistance of multiple party members.
When cast, all party members in a limited area of effect will have an increased chance of taking decreased damage from Lightning-based attacks and no damage from Lightning-based spells. It may be recast every 10 seconds, for 12 MP. Its effectiveness varies depending on the player's Enhancing Magic skill.
Should a player have a White Mage as their sub-job, their character will have access to Barthundra once reaching level 50.