Saphira

Snarling, Thorn disengaged from Saphira. He arched his neck, and Eragon heard an inrush of air as the stocky dragon filled his lungs. Eragon ducked, burying his face in the corner of his elbow. A ravening inferno engulfed Saphira. The heat of the fire could not harm them—Eragon’s wards prevented that—but the torrent of incandescent flames was still blinding.

Fire in the Sky, Brisingr, page 518