Razac

Raising his right hand above his head, Eragon cried, “Brisingr!” and threw a roaring fireball toward the Ra’zac. They dodged, and the fireball splashed against the rock floor, guttered for a moment, and then winked out of existence. The spell was silly and childish and could cause no conceivable damage if Galbatorix had protected the Ra’zac like the Lethrblaka. Still, Eragon found the attack immensely satisfying. It also distracted the Ra’zac long enough for Eragon to dash over to Roran and press his back against his cousin’s.

Assault on Helgrind, Brisingr