Casca: The Damned

In audiobook #7 of the "Casca Series," Casca departs the Persian Empire and journeys back to the Northlands, seeking memories of happier times at Helsfjord and The Hold. His path leads him into a feral existence among wolves, earning him the ominous nickname "Monster of the Mist," as he becomes a feared and primal figure. He is eventually called back from this wild state to confront a formidable adversary, Attila the Hun, in a battle against one of history's most notorious conquerors.