Surge


 * "Restore party HP with a stream of life."

Location
Surge is found deep within Barai Temple. It can be retrieved by shooting Fireball at it. If you don't get it at the first opportunity, a cutscene will show you how to do it while you're heading back.

Surge's Djinn Guide entry is as follows:
 * "This geyser spirit joins the party in Barai Temple. Surge can conjure a hot-spring effect that relieves fatigue for allies."