มหาศึกจ้าวมังกร

Five years after vanishing, Vidar has buried his past as the legendary Viking Lord of Dragons, living in hiding as a stablehand on the frontier of Alderwyn. But when Hakon, chieftain of Valkr, drives the empire to the brink of ruin, Vidar must return to the skies and choose between blood and faith—for only he can decide the fate of the empire.